The interpretation timeline
Genesis 4:8 Douay-Rheims

And Cain said to Abel his brother: Let us go forth abroad. And when they were in the field, Cain rose up against his brother Abel, and slew him.

A.D. 45 – 1871 11 witnesses 13 excerpts

Patristic

before A.D. 750
45
A.D.
c. 15 B.C.–A.D. 45
“I. And Cain said to Abel his brother, " Let us go to the field. And it came to pass, that while they were in the field, Cain rose up against Abel his brother, and slew him."' What Cain proposes to do is this : having by invitation led Abel on to a dispute, to convince him by main force, using plausible and probable sophisms ; for the field to which he invites him to come, we may call a symbol of rivalry and contention, forming our conjectures of things that are uncertain from our perception of those which are manifest. For we see that most contests, both in peace and in war, take place in the open fields. In peace, therefore, all those who practise gymnastic contests, seek for level race-courses and plain fields : and, in a war, it is not usual to have battles, of either infantry or cavalry, on hills ; for many more disasters arise from the" unfavourable character of the ground, than from anything that the enemies do to one another.”
Source
“XIV. It would therefore have been consistent for Abel to practise prudence, a very saving virtue, and to have remained at home, disregarding the invitation to the arena of discussion and contest, which was given to him, imitating Rebecca, that is perseverance, who, when Esau, the companion of wickedness, was pouring forth threats, advised the practiser of wisdom, Jacob, to retreat before him who was about to plot against him, until he should have relaxed in his fierce hostility to him, for Esau had been holding out an intolerable threat over Jacob, saying, " The days of mourning for my Father are at hand, that then I may slay my brother Jacob ;" for he is wishing only that that species in the nature of things which is void of passions, namely, Isaac (to whom the oracle had been given, that he should not descend into Egypt), t may be the victim of an irrational affection, in order I suppose that he may be wounded by the stings of pleasure or pain, or of any other passion, showing that the man who is not wholly perfect Genesis xxvii. 41. t Genesis xxvi. 2. TEE WORSE PLOTTING AGAINST THE LETTER. 253 and who makes laborious improvements, will receive not merely a wound, but utter destruction. However, the good God will neither allow that invulnerable species among created things to be subdued by passion, nor will he surrender the practice of virtue to bloody and raging destruction. On which account we read in a subsequent passage, " Cain rose up against Abel, his brother, and slew him." For according to the first imagination, he suggests the idea that Abel has been killed. But if you look at it according to the most accurate investigation, you will see that he intimates that Cain himself was slain by himself, so that we ought to read it thus : " Cain rose up and killed himself," and not the other. And very reasonably may we attribute this to him. For the soul, which destroys out of itself the virtue -loving and Godloving principle, has died as to the life of virtue, so that Abel (which appears a most paradoxical assertion) both is dead and alive. He is dead, indeed, having been slain by the foolish mind, but he lives according to the happy life which is in God. And the holy oracle which has been given will bear witness, which expressly says, that he cried out loudly, and betrayed clearly by his cries f what he had suffered from the concrete evil, that is from the body. For how could one who no longer existed have conversed ?”
Source
99
A.D.
Clement of Rome Patristic
d. A.D. 99
“Every kind of honour and happiness was bestowed upon you, and then was fulfilled that which is written, "My beloved ate and drank, and was enlarged and became fat, and kicked." [Deuteronomy 32:15] Hence flowed emulation and envy, strife and sedition, persecution and disorder, war and captivity. So the worthless rose up against the honoured, those of no reputation against such as were renowned, the foolish against the wise, the young against those advanced in years. For this reason righteousness and peace are now far departed from you, inasmuch as every one abandons the fear of God, and has become blind in His faith, neither walks in the ordinances of His appointment, nor acts a part becoming a Christian, but walks after his own wicked lusts, resuming the practice of an unrighteous and ungodly envy, by which death itself entered into the world. [Wisdom 2:24] For thus it is written: "And it came to pass after certain days, that Cain brought of the fruits of the earth a sacrifice unto God; and Abel also brought of the firstlings of his sheep, and of the fat thereof. And God had respect to Abel and to his offerings, but Cain and his sacrifices He did not regard. And Cain was deeply grieved, and his countenance fell. And God said to Cain, Why are you grieved, and why is your countenance fallen? If you offer rightly, but do not divide rightly, have you not sinned? Be at peace: your offering returns to yourself, and you shall again possess it. And Cain said to Abel his brother, Let us go into the field. And it came to pass, while they were in the field, that Cain rose up against Abel his brother, and slew him." [Genesis 4:3-8] You see, brethren, how envy and jealousy led to the murder of a brother. Through envy, also, our father Jacob fled from the face of Esau his brother [Genesis 27:41-45]. Envy made Joseph be persecuted unto death, and to come into bondage. [Genesis 37:18-28] Envy compelled Moses to flee from the face of Pharaoh king of Egypt, when he heard these words from his fellow-countryman, "Who made you a judge or a ruler over us? Will you kill me, as you killed the Egyptian yesterday?" [Exodus 2:14] On account of envy, Aaron and Miriam had to make their abode without the camp. [Numbers 12:14-15] Envy brought down Dathan and Abiram alive to Hades, through the sedition which they excited against God's servant Moses. [Numbers 16:33] Through envy, David not only underwent the hatred of foreigners, but was also persecuted by Saul king of Israel. [1 Samuel 21:10-15]”
Source
523
A.D.
c. A.D. 450–523
“And moreover we may see the cunning of Cain from the outlet which he found for his wickedness, for when he meditated slaying Abel his brother, and was not able to do it because he was near unto his parents, he said "Let us go down into the plain;" and Abel, in his innocency, heard and was persuaded like a child. And his simplicity imagined not wickedness, and he did not consider in his heart why Cain called him to the plain, neither did he perceive Cain's hatred towards him, because simplicity knoweth not how to be a spectator of these things; but in the innocency of his heart and in brotherly love towards him he turned, and whithersoever he called him he went readily and obediently. And observe here also the works of simplicity, and have regard unto the injurious effects of cunning and wickedness, and be strenuous to be on the side of the simple, who have at all times pleased God; and reject cunning as something which is unfit for thee, and which is not meet for the discipleship in which thou standest.”
Source
“Now this is the first lust which conquered the world, and because of it the first transgression of the law took place; and next Cain also, in turning unto this, meditated the killing of his brother that he might inherit the earth by himself.”

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
ויאמר קין אל הבל AND CAIN SPAKE TO ABEL — He began an argument, striving and contending with him, to seek a pretext to kill him. There are Midrashic explanations of these words, but this is the plain sense of the text.”
1167
A.D.
Ibn Ezra Jewish
1089–1167
“CAIN SAID "..." - It seems to me that [Cain] said to [Abel] all of the ways that God had rebuked him. One must have been born on a dismal day to ask the question, "How did he kill him without [the advent of] a sword?" What an astonishing question, since he could have killed him by throttling him with his bare hands, moreover, there were thousands of sticks and rocks about.”
Source
1270
A.D.
Ramban Jewish
1194–1270
“AND CAIN SPOKE TO ABEL HIS BROTHER. He began a conversation of argument and contention with him in order to seek a pretext against him and so kill him. This is the language of Rashi. Rabbi Abraham ibn Ezra said that the interpretation that appears most likely to him is that Cain related to Abel all the chastisements with which G-d had reprimanded him [and Cain accused Abel of having brought them upon him]. But in my opinion it is connected with the following words of Scripture: and it came to pass, when they were in the field, meaning that Cain said to Abel, “Let us go forth into the field,” and there he secretly killed him. It is possible that his intention in killing Abel was that the world be built up from himself for he thought that his father would not have any more children. He also feared that the main building up of the world might be from his brother, [which seemed likely since it was he] whose offering had been favorably accepted.”
Source

Post-Reformation

c. 1650 – 1900
1714
A.D.
Matthew Henry Reformed
1662–1714
“We have here the progress of Cain's anger, and the issue of it in Abel's murder, which may be considered two ways: - I. As Cain's sin; and a scarlet, crimson, sin it was, a sin of the first magnitude, a sin against the light and law of nature, and which the consciences even of bad men have startled at. See in it, 1. The sad effects of sin's entrance into the world and into the hearts of men. See what a root of bitterness the corrupt nature is, which bears this gall and wormwood. Adam's eating forbidden fruit seemed but a little sin, but it opened the door to the greatest. 2. A fruit of the enmity which is in the seed of the serpent against the seed of the woman. As Abel leads the van in the noble army of martyrs (Mat 23:35), so Cain stand in the front of the ignoble army of persecutors, Jde 1:11. So early did he that was after the flesh persecute him that was after the Spirit; and so it is now, more or less (Gal 4:29), and so it will be till the war shall end in the eternal salvation of all the saints and the eternal perdition of all that hate them. 3. See also what comes of envy, hatred, malice, and all uncharitableness; if they be indulged and cherished in the soul, they are in danger of involving men in the horrid guilt of murder itself. Rash anger is heart-murder, Mat 5:21, Mat 5:22. Much more is malice so; he that hates his brother is already a murderer before God; and, if God leave him to himself, he wants nothing but an opportunity to render him a murderer before the world. Many were the aggravations of Cain's sin. (1.) It was his brother, his own brother, that he murdered, his own mother's son (Psa 50:20), whom he ought to have loved, his younger brother, whom he ought to have protected. (2.) He was a good brother, one who had never done him any wrong, nor given him the least provocation in word or deed, but one whose desire had been always towards him, and who had been, in all instances, dutiful and respectful to him. (3.) He had fair warning given him, before, of this. God himself had told him what would come of it, yet he persisted in his barbarous design. (4.) It should seem that he covered it with a show of friendship and kindness: He talked with Abel his brother, freely and familiarly, lest Abel should suspect danger, and keep out of his reach. Thus Joab kissed Abner, and then killed him. Thus Absalom feasted his brother Amnon and then killed him. According to the Septuagint [a Greek version of the Old Testament, supposed to have been translated by seventy-two Jews, at the desire of Ptolemy Philadelphus, above 200 years before Christ], Cain said to Abel, Let us go into the field; if so, we are sure Abel did not understand it (according to the modern sense) as a challenge, else he would not have accepted it, but as a brotherly invitation to go together to their work. The Chaldee paraphrast adds that Cain, when they were in discourse in the field, maintained that there was no judgment to come, no future state, no rewards and punishments in the other world, and that when Abel spoke in defence of the truth Cain took that occasion to fall upon him. However, (5.) That which the scripture tells us was the reason why he slew him was a sufficient aggravation of the murder; it was because his own works were evil and his brother's righteous, so that herein he showed himself to be of that wicked one (Jo1 3:12), a child of the devil, as being an enemy to all righteousness, even in his own brother, and, in this, employed immediately by the destroyer. Nay, (6.) In killing his brother, he directly struck at God himself; for God's accepting Abel was the provocation pretended, and for this very reason he hated Abel, because God loved him. (7.) The murder of Abel was the more inhuman because there were now so few men in the world to replenish it. The life of a man is precious at any time; but it was in a special manner precious now, and could ill be spared. II. As Abel's suffering. Death reigned ever since Adam sinned, but we read not of any taken captive by him till now; and now, 1. The first that dies is a saint, one that was accepted and beloved of God, to show that, though the promised seed was so far to destroy him that had the power of death as to save believers from its sting, yet still they should be exposed to its stroke. The first that went to the grave went to heaven. God would secure to himself the first-fruits, the first-born to the dead, that first opened the womb into another world. Let this take off the terror of death, that it was betimes the lot of God's chosen, which alters the property of it. Nay, 2. The first that dies is a martyr, and dies for his religion; and of such it may more truly be said than of soldiers that they die on the bed of honour. Abel's death has not only no curse in it, but it has a crown in it; so admirably well is the property of death altered that it is not only rendered innocent and inoffensive to those that die in Christ, but honourable and glorious to those that die for him. Let us not think it strange concerning the fiery trial, nor shrink if we be called to resist unto blood; for we know there is a crown of life for all that are faithful unto death.”
Source
1771
A.D.
John Gill Reformed
1697–1771
“And the Lord said unto Cain, where is Abel thy brother?.... Perhaps this was said to him the next time he came to offer, he not being with him: this question is put, not as being ignorant where he was, but in order to bring Cain to a conviction and confession of his sin, to touch his conscience with it, and fill it with remorse for it; and, for the aggravation of it, observes the relation of Abel to him, his brother: and he said, I know not; which was a downright lie; for he must know where he had left him or laid him: this shows him to be under the influence of Satan, who was a liar, and the father of lies, as well as a murderer from the beginning; and that he was so blinded by him, as to forget whom he was speaking to; that he was the omniscient God, and knew the wickedness he had done, and the falsehood he now delivered, and was capable of confronting him with both, and of inflicting just punishment on him. Am I my brother's keeper? which was very saucily and impudently spoken: it is not only put by way of interrogation, but of admiration, as Jarchi observes, as wondering at it, that God should put such a question to him, since he knew he had not the charge of his brother, and his brother was at age to take care of himself; and if not, it rather belonged to God and his providence to take care of him, and not to him: so hardened was he in his iniquity, he had stretched out his hand against his brother, and now he stretched it out against God, and ran upon him, even on the thick bosses of his buckler.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“Cain talked with Abel his brother - ויאמר קין vaiyomer Kayin, and Cain said, etc.; not talked, for this construction the word cannot bear without great violence to analogy and grammatical accuracy. But why should it be thus translated? Because our translators could not find that any thing was spoken on the occasion; and therefore they ventured to intimate that there was a conversation, indefinitely. In the most correct editions of the Hebrew Bible there is a small space left here in the text, and a circular mark which refers to a note in the margin, intimating that there is a hiatus or deficiency in the verse. Now this deficiency is supplied in the principal ancient versions, and in the Samaritan text. In this the supplied words are, Let Us Walk Out Into The Field. The Syriac has, Let us go to the desert. The Vulgate Egrediamur foras, Let us walk out. The Septuagint, Διελθωμεν εις το πεδον, Let us go out into the field. The two Chaldee Targums have the same reading; so has the Coptic version. This addition is completely lost from every MS. of the Pentateuch now known; and yet it is sufficiently evident from the Samaritan text, the Samaritan version, the Syriac, Septuagint, and Vulgate, that it was in the most authentic copies of the Hebrew before and some time since the Christian era. The words may therefore be safely considered as a part of the sacred text, and with them the whole passage reads clear and consistently: "And Cain said unto Abel his brother, Let us go out into the field: and it came to pass, when they were in the field, that Cain rose up," etc. The Jerusalem Targum, and the Targum of Jonathan ben Uzziel, pretend to give us the subject of their conversation: as the piece is curious, I shall insert the substance of it, for the sake of those who may not have access to the originals. "And Cain said unto Hebel his brother, Let us go out into the field; and it came to pass that, when they were in the field, Cain answered and said to Hebel his brother, I thought that the world was created in mercy, but it is not governed according to the merit of good works nor is there any judgment, nor a Judge, nor shall there be any future state in which good rewards shall be given to the righteous, or punishment executed on the wicked; and now there is respect of persons in judgment. On what account is it that thy sacrifice has been accepted, and mine not received with complacency? And Hebel answered and said, The world was created in mercy, and it is governed according to the fruit of good works; there is a Judge, a future world, and a coming judgment, where good rewards shall be given to the righteous, and the impious punished; and there is no respect of persons in judgment; but because my works were better and more precious than thine, my oblation was received with complacency. And because of these things they contended on the face of the field, and Cain rose up against Hebel his brother, and struck a stone into his forehead, and killed him." It is here supposed that the first murder committed in the world was the consequence of a religious dispute; however this may have been, millions since have been sacrificed to prejudice, bigotry, and intolerance. Here, certainly, originated the many-headed monster, religious persecution; the spirit of the wicked one in his followers impels them to afflict and destroy all those who are partakers of the Spirit of God. Every persecutor is a legitimate son of the old murderer. This is the first triumph of Satan; it is not merely a death that he has introduced, but a violent one, as the first-fruits of sin. It is not the death of an ordinary person, but of the most holy man then in being; it is not brought about by the providence of God, or by a gradual failure and destruction of the earthly fabric, but by a violent separation of body and soul; it is not done by a common enemy, from whom nothing better could be expected, but by the hand of a brother, and for no other reason but because the object of his envy was more righteous than himself. Alas! how exceeding sinful does sin appear in its first manifestation!”
Source
1849
A.D.
1774–1849
“Let us go forth abroad. These words are now wanting in the Hebrew; being omitted, according to Kennicott, since the days of Aquila 130; they are found in the Samaritan copy and version, in the Septuagint, &c. (Haydock) — The Masorets place a mark, as if something were defective here, and in 27 other verses, or in 25 at least. (Haydock) — Abel’s violent death was a figure of that of Jesus Christ, inflicted for the like cause. See Hebrews xii. 2. (Calmet) — In consequence of these crimes, Cain separated from the Church, and the Jews became no longer God’s people: both Cain and the Jews became vagabonds. (Haydock) — The Targum of Jerusalem observes, that Cain talked against God’s providence and the future world, which Abel hearing with marked indignation, Cain took occasion to kill him. (Worthington)”
Source
1871
A.D.
1871
“And Cain talked with Abel his brother--Under the guise of brotherly familiarity, he concealed his premeditated purpose till a convenient time and place occurred for the murder (Jo1 3:12; Jde 1:11).”
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.