The interpretation timeline
Mark 2:18 Douay-Rheims

And the disiples of John and the Pharisees used to fast; and they come and say to him: Why do the disciples of John and of the Pharisees fast; but thy disciples do not fast?

A.D. 407 – 1849 10 witnesses 14 excerpts

Patristic

before A.D. 750
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“(non occ.) The disciples of John, therefore, and of the Pharisees, being jealous of Christ, ask Him, whether He alone of all men with His disciples could, without abstinence and toil, conquer in the fight of the passions.”
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“(de Con. Evan. ii. 27) But it may be thought that He added Pharisees, because they joined with the disciples of John in saying this to the Lord, whilst Matthew relates that the disciples of John alone said it: but the words which follow rather shew that those who said it spoke not of themselves, but of others. For it goes on, And they come and say unto him, Why do the disciples, &c. For these words shew, that the guests who were there came to Jesus, and had said this same thing to the disciples, so that in the words which he uses, they came, he speaks not of those same persons, of whom he had said, And the disciples of John and the Pharisees were fasting. But as they were fasting, those persons who remembered it, come to him. Matthew then says this, And there came to him the disciples of John, saying, because the Apostles also were there, and all eagerly, as each could, objected these things.”
Source
“(ubi sup.) Mark here calls them children of the nuptials, whom Matthew calls children of the bridegroom; for we understand the children of the nuptials to be not only those of the bridegroom, but also of the bride.”
735
A.D.
Bede the Venerable Patristic
c. A.D. 672–735
“But John did not drink wine and strong drink, because he who has no power by nature, obtains more merit by abstinence. But why should the Lord, to whom it naturally belonged to forgive sins, shun those whom he could make more pure, than those who fast? But Christ also fasted, lest He should break the precept, He ate with sinners, that thou mightest see His grace, and acknowledge His power. It goes on; And Jesus said unto them, Can the children, &c.”
Source

Scholastic

c. 1100 – 1500
1107
A.D.
c. 1055–1107
“For the disciples of John being in an imperfect state, continued in Jewish customs.”
“He also calls Himself a bridegroom, not only as betrothing to Himself virgin minds, but because the time of His first coming is not a time of sorrow, nor of sadness to believers, neither does it bring with it toil, but rest. For it is without any works of the law, giving rest by baptism, by which we easily obtain salvation without toil. But the sons of the nuptials or of the Bridegroom are the Apostles; because they, by the grace of God, are made worthy of every heavenly blessing, by the grace of God, and partakers of every joy.”
Source
“Or else the disciples are likened to old garments on account of the infirmity of their minds, on which it was not fitting to impose the heavy command of fasting.”

Post-Reformation

c. 1650 – 1900
1714
A.D.
Matthew Henry Reformed
1662–1714
“Christ had been put to justify himself in conversing with publicans and sinners: here he is put to justify his disciples; and in what they do according to his will he will justify them, and bear them out. I. He justifies them in their not fasting, which was turned to their reproach by the Pharisees. Why do the Pharisees and the disciples of John fast? They used to fast, the Pharisees fasted twice in the week (Luk 18:12), and probably the disciples of John did so too; and, it should seem, this very day, when Christ and his disciples were feasting in Levi's house, was their fast-day, for the word is nēsteuousi - they do fast, or are fasting, which aggravated the offence. Thus apt are strict professors to make their own practice a standard, and to censure and condemn all that do not fully come up to it. They invidiously suggest that if Christ went among sinners to do them good, as he had pleaded, yet the disciples went to indulge their appetites, for they never knew what it was to fast, or to deny themselves. Note, Ill-will always suspects the worst. Two things Christ pleads in excuse of his disciples not fasting. 1. That these were easy days with them, and fasting was not so seasonable now as it would be hereafter, Mar 2:19, Mar 2:20. There is a time for all things. Those that enter into the married state, must expect care and trouble in the flesh, and yet, during the nuptial solemnity, they are merry, and think it becomes them to be so; it was very absurd for Samson's bride to weep before him, during the days that the feast lasted, Jdg 14:17. Christ and his disciples were but newly married, the bridegroom was yet with them, the nuptials were yet in the celebrating (Matthew's particularly); when the bridegroom should be removed from them to the far country, about his business, then would be a proper time to sit as a widow, in solitude and fasting. 2. That these were early days with them, and they were not so able for the severe exercises of religion as hereafter they would be. The Pharisees had long accustomed themselves to such austerities; and John Baptist himself came neither eating nor drinking. His disciples from the first inured themselves to hardships, and thus found it easier to bear strict and frequent fasting, but it was not so with Christ's disciples; their Master came eating and drinking, and had not bred them up to the difficult services of religion as yet, for it was all in good time. To put them upon such frequent fasting at first, would be a discouragement to them, and perhaps drive them off from following Christ; it would be of as ill consequence as putting new wine into old casks, or sewing new cloth to that which is worn thin and threadbare, Mar 2:21, Mar 2:22. Note, God graciously considers the frame of young Christians, that are weak and tender, and so must we; nor must we expect more than the work of the day in its day, and that day according to the strength, because it is not in our hands to give strength according to the day. Many contract an antipathy to some kind of food, otherwise good, by being surfeited with it when they are young; so, many entertain prejudices against the exercises of devotion by being burthened with them, and made to serve with an offering, at their setting out. Weak Christians must take heed of over-tasking themselves, and of making the yoke of Christ otherwise than as it is, easy, and sweet, and pleasant. II. He justifies them in plucking the ears of corn on the sabbath day, which, I will warrant you, a disciples of the Pharisees would not dare to have done; for it was contrary to an express tradition of their elders. In this instance, as in that before, they reflect upon the discipline of Christ's school, as if it were not so strict as that of theirs: so common it is for those who deny the power of godliness, to be jealous for the form, and censorious of those who affect not their form. Observe, 1. What a poor breakfast Christ's disciples had on a sabbath-day morning, when they were going to church (Mar 2:23); they plucked the ears of corn, and that was the best they had. They were so intent upon spiritual dainties, that they forgot even their necessary food; and the word of Christ was to them instead of that; and their zeal for it even ate them up. The Jews made it a piece of religion, to eat dainty food on sabbath days, but the disciples were content with any thing. 2. How even this was grudged them by the Pharisees, upon supposition that it was not lawful to pluck the ears of corn on the sabbath day, that that was as much a servile work as reaping (Mar 2:24); Why do they on the sabbath day that which is not lawful? Note, If Christ's disciples do that which is unlawful, Christ will be reflected upon, and upbraided with it, as he was here, and dishonour will redound to his name. It is observable, that when the Pharisees thought Christ did amiss, they told the disciples (Mar 2:16); and now when they thought the disciples did amiss, they spoke to Christ, as make-bates, that did what they could to sow discord between Christ and his disciples, and make a breach in the family. 3. How Christ defended them in what they did. (1.) By example. They had a good precedent for it in David's eating the show-bread, when he was hungry, and there was no other bread to be had (Mar 2:25, Mar 2:26); Have ye never read? Note, Many of our mistakes would be rectified, and our unjust censures of others corrected, if we would but recollect what we have read in the scripture; appeals to that are most convincing. "You have read that David, the man after God's own heart, when he was hungry, made no difficulty of eating the show-bread, which by the law none might eat of but the priests and their families." Note, Ritual observances must give way to moral obligations; and that may be done in a case of necessity, which otherwise may not be done. This, it is said, David did in the days of Abiathar the High-Priest; or just before the days of Abiathar, who immediately succeeded Abimelech his father in the pontificate, and, it is probable, was at that time his father's deputy, or assistant, in the office; and he it was that escaped the massacre, and brought the ephod to David. (2.) By argument. To reconcile them to the disciples' plucking the ears of corn, let them consider, [1.] Whom the sabbath was made for (Mar 2:27); it was made for man, and not man for the sabbath. This we had not in Matthew. The sabbath is a sacred and divine institution; but we must receive and embrace it as a privilege and a benefit, not as a task and a drudgery. First, God never designed it to be an imposition upon us, and therefore we must not make it so to ourselves. Man was not made for the sabbath, for he was made a day before the sabbath was instituted. Man was made for God, and for his honour and service, and he just rather die than deny him; but he was not made for the sabbath, so as to be tied up by the law of it, from that which is necessary to the support of his life. Secondly, God did design it to be an advantage to us, and so we must make it, and improve it. He made if for man. 1. He had some regard to our bodies in the institution, that they might rest, and not be tired out with the constant business of this world (Deu 5:14); that thy man-servant and thy maid-servant may rest. Now he that intended the sabbath-rest for the repose of our bodies, certainly never intended it should restrain us, in a case of necessity, from fetching in the necessary supports of the body; it must be construed so as not to contradict itself - for edification, and not for destruction. 2. He had much more regard to our souls. The sabbath was made a day of rest, only in order to its being a day of holy work, a day of communion with God, a day of praise and thanksgiving; and the rest from worldly business is therefore necessary, that we may closely apply ourselves to this work, and spend the whole time in it, in public and in private; but then time is allowed us for that which is necessary to the fitting of our bodies for the service of our souls in God's service, and the enabling of them to keep pace with them in that work. See here, (1.) What a good Master we serve, all whose institutions are for our own benefit, and if we be so wise as to observe them, we are wise for ourselves; it is not he, but we, that are gainers by our service. (2.) What we should aim at in our sabbath work, even the good of our own souls. If the sabbath was made for man, we should then ask ourselves at night, "What am I the better for this sabbath day?" (3.) What care we ought to take not to make those exercises of religion burthens to ourselves or others, which God ordained to be blessings; neither adding to the command by unreasonable strictness, nor indulging those corruptions which are adverse to the command, for thereby we make those devout exercises a penance to ourselves, which otherwise would be a pleasure. [2.] Whom the sabbath was made by (Mar 2:28); "The Son of man is Lord also of the sabbath; and therefore he will not see the kind intentions of the institution of it frustrated by your impositions." Note, The sabbath days are days of the Son of man; he is the Lord of the day, and to his honour it must be observed; by him God made the worlds, and so it was by him that the sabbath was first instituted; by him God gave the law at mount Sinai, and so the fourth commandment was his law; and that little alteration that was shortly to be made, by the shifting of it one day forward to the first day of the week, was to be in remembrance of his resurrection, and therefore the Christian sabbath was to be called the Lord's day (Rev 1:10), the Lord Christ's day; and the Son of man, Christ, as Mediator, is always to be looked upon as Lord of the sabbath. This argument he largely insists upon in his own justification, when he was charged with having broken the sabbath, Joh 5:16.”
1771
A.D.
John Gill Reformed
1697–1771
“And Jesus said unto them,.... Both to John's disciples and the Pharisees, can the children of the bride chamber fast, while the bridegroom is with them? Suggesting that he was the bridegroom, as John their master had called him, Joh 3:29, and that his disciples were the children of the bride chamber; and that it was very unsuitable for them, and very unreasonable to desire them to fast at such a time, and under such a character: wherefore the answer returned by Christ himself to the question is, as long as they have the bridegroom with them, they cannot fast: all which the Syriac version expresses by "no": see Gill on Mat 9:15.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“Why do the disciples of John and of the Pharisees fast - See this largely explained on Mat 9:14 (note), etc. The following vices are very common to Pharisees. 1. They are more busied in censuring the conduct of others than in rectifying their own. 2. They desire that every one should regulate his piety by theirs; and embrace their particular customs and forms of devotion. 3. They speak of and compare themselves with other people, only that they may have an opportunity of distinguishing and exalting themselves. On the nature, times, and duration of fasting, see Mat 6:16; Mat 9:15.”
Source
1849
A.D.

Undated

date unknown
date
unknown
Glossa Ordinaria Medieval
“(non occ.) As above, the Master was accused to the disciples for keeping company with sinners in their feasts, so now, on the other hand, the disciples are complained of to the Master for their omission of fasts, that so matter for dissension might arise amongst them. Wherefore it is said, And the disciples of John and the Pharisees used to fast.”
Source
date
unknown
“(Vict. Ant. e Cat. in Marc.) He then calls Himself a bridegroom, as if about to be betrothed to the Church. For the betrothal is giving an earnest, namely, that of the grace of the Holy Ghost, by which the world believed.”
“(Vict. Ant. e Cat. in Marc.) But intercourse with Him, He says, is far removed from all sorrow, when He adds, As long as they have the bridegroom with them, they cannot fast. He is sad, from whom some good is far removed; but he who has it present with him rejoices, and is not sad. But that He might destroy their elation of heart, and shew that He intended not His own disciples to be licentious, He adds, But the days will come when the bridegroom shall be taken, &c. as if He said, The time will come, when they will shew their firmness; for when the Bridegroom shall be taken from them, they will fast as longing for His coming, and in order to unite to Him their spirits, cleansed by bodily suffering. He shews also that there is no necessity for His disciples to fast, as having present with them the Bridegroom of human nature, Who every where executes the words of God, and Who gives the seed of life. The sons of the Bridegroom also cannot, because they are infants, be entirely conformed to their Father, the Bridegroom, Who, considering their infancy, deigns to allow them not to fast: but when the Bridegroom is gone, they will fast, through desire of Him; when they have been made perfect, they will be united to the Bridegroom in marriage, and will always feast at the king’s banquet.”
Source
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.