The interpretation timeline
2 Kings 2:9 Douay-Rheims

And when they were gone over, Elias said to Eliseus: Ask what thou wilt have me to do for thee, before I be taken away from thee. And Eliseus said: I beseech thee that in me may be thy double spirit.

A.D. 430 – 1875 8 witnesses

Patristic

before A.D. 750
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“Therefore, he who is everywhere does not dwell in all, and he does not even dwell equally in those in whom he does dwell. Otherwise, what is the meaning of the request made by Elisha that there might be in him double the Spirit of God that was in Elijah? And how is it that among the saints some are more holy than others, except that they have a more abundant indwelling in God? How, then, did we speak the truth when we said above that God is everywhere wholly present if he is more amply present in some, less in others? But it should be noticed with care that we said he is everywhere wholly present in himself, not in things of which some have a greater capacity for him, others less.”
Source
523
A.D.
c. A.D. 450–523
“And again also he commanded his disciple with authority, saying, "Ask whatsoever thou wishest, and I will give it to thee before I am taken from thee;" and according to what the disciple asked and the master commanded, the Spirit ministered in very deed, and bestowed the gift upon Elisha.”

Post-Reformation

c. 1650 – 1900
1714
A.D.
Matthew Henry Reformed
1662–1714
“Here, I. Elijah makes his will, and leaves Elisha his heir, now anointing him to be prophet in his room, more than when he cast his mantle upon him, Kg1 19:19. 1. Elijah, being greatly pleased with the constancy of Elisha's affection and attendance, bade him ask what he should do for him, what blessing he should leave him at parting; he does not say (as bishop Hall observes), "Ask of me when I am gone, in heaven I shall be better able to befriend thee," but, "Ask before I go." Our friends on earth may be spoken to, and can give us an answer, but we know not that we can have access to any friend in heaven but Christ, and God in him. Abraham is ignorant of us. 2. Elisha, having this fair opportunity to enrich himself with the best riches, prays for a double portion of his spirit. He asks not for wealth, nor honour, nor exemption from trouble, but to be qualified for the service of God and his generation, he asks, (1.) For the Spirit, not that the gifts and graces of the Spirit were in Elijah's power to give, therefore he says not, "Give me the Spirit" (he knew very well it was God's gift), but "Let it be upon me, intercede with God for this for me." Christ bade his disciples ask what they would, not one, but all, and promised to send the Spirit, with much more authority and assurance than Elijah could. (2.) For his spirit, because he was to be a prophet in his room, to carry on his work, to father the sons of the prophets and face their enemies, because he had the same perverse generation to deal with that he had, so that, if he have not his spirit, he has not strength according to the day. (3.) For a double portion of his spirit; he does not mean double to what Elijah had, but double to what the rest of the prophets had, from whom so much would not be expected as from Elisha, who had been brought up under Elijah. It is a holy ambition to covet earnestly the best gifts, and those which will render us most serviceable to God and our brethren. Note, We all ought, both ministers and people, to set before us the example of our predecessors, to labour after their spirit, and to be earnest with God for that grace which carried them through their work and enabled them to finish well. 3. Elijah promised him that which he asked, but under two provisos, Kg2 2:10. (1.) Provided he put a due value upon it and esteem it highly: this he teaches him to do by calling it a hard thing, not too hard for God to do, but too great for him to expect. Those are best prepared for spiritual blessings that are most sensible of their worth and their own unworthiness to receive them. (2.) Provided he kept close to his master, even to the last, and was observant of him: If thou see me when I am taken from thee, it shall be so, otherwise not. A diligent attendance upon his master's instructions, and a careful observance of his example, particularly now in his last scene, were the condition and would be a proper means of obtaining much of his spirit. Taking strict notice of the manner of his ascension would likewise be of great use to him. The comforts of departing saints, and their experiences, will mightily help both to gild our comforts and to steel our resolutions. Or, perhaps, this was intended only as a sign: "If God favour thee so far as to give thee a sight of me when I ascend, take that for a token that he will do this for thee, and depend upon it." Christ's disciples saw him ascend, and were thereupon assured that they should, in a little time, be filled with his Spirit, Act 1:8. Elisha, we may suppose, hereupon prayed earnestly, Lord, show me this token for good. II. Elijah is carried up to heaven in a fiery chariot, Kg2 2:11. Like Enoch, he was translated, that he should not see death; and was (as Mr. Cowley expresses it) the second man that leaped the ditch where all the rest of mankind fell, and went not downward to the sky. Many curious questions might be asked about this matter, which could not be answered. Let it suffice that we are here told, 1. What his Lord, when he came, found him doing. He was talking with Elisha, instructing and encouraging him, directing him in his work, and quickening him to it, for the good of those whom he left behind. He was not meditating nor praying, as one wholly taken up with the world he was going to, but engaged in edifying discourse, as one concerned about the kingdom of God among men. We mistake if we think our preparation for heaven is carried on only by contemplation and the acts of devotion. Usefulness to others will pass as well in our account as any thing. Thinking of divine things is good, but talking of them (if it come from the heart) is better, because for edification, Co1 14:4. Christ ascended as he was blessing his disciples. 2. What convoy his Lord sent for him - a chariot of fire and horses of fire, which appeared either descending upon them from the clouds or (as bishop Patrick thinks) running towards them upon the ground: in this form the angels appeared. The souls of all the faithful are carried by an invisible guard of angels into the bosom of Abraham; but, Elijah being to carry his body with him, this heavenly guard was visible, not in a human shape, as usual, though they might so have borne him up in their arms, or carried him as on eagles' wings, but that would have been to carry him like a child, like a lamp (Isa 40:11, Isa 40:31); they appear in the form of a chariot and horses, that he may ride in state, may ride in triumph, like a prince, like a conqueror, yea, more than a conqueror. The angels are called in scripture cherubim and seraphim, and their appearance here, though it may seem below their dignity, answers to both those names; for (1.) Seraphim signifies fiery, and God is said to make them a flame of fire, Psa 104:4. (2.) Cherubim (as many think) signifies chariots, and they are called the chariots of God (Psa 68:17), and he is said to ride upon a cherub (Psa 18:10), to which perhaps there is an allusion in Ezekiel's vision of four living creatures, and wheels, like horses and chariots; in Zechariah's vision, they are so represented, Zac 1:8; Zac 6:1. Compare Rev 6:2, etc. See the readiness of the angels to do the will go God, even in the meanest services, for the good of those that shall be heirs of salvation. Elijah must remove to the world of angels, and therefore, to show how desirous they were of his company, some of them would come to fetch him. The chariot and horses appeared like fire, not for burning, but brightness, not to torture or consume him, but to render his ascension conspicuous and illustrious in the eyes of those that stood afar off to view it. Elijah had burned with holy zeal for God and his honour, and now with a heavenly fire he was refined and translated. 3. How he was separated from Elisha. This chariot parted them both asunder. Note, The dearest friends must part. Elisha had protested he would not leave him, yet now is left behind by him. 4. Whither he was carried. He went up by a whirlwind into heaven. The fire tends upward; the whirlwind helped to carry him through the atmosphere, out of the reach of the magnetic virtue of this earth, and then how swiftly he ascended through the pure ether to the world of holy and blessed spirits we cannot conceive. "But where he stopped will ne'er be known, 'Till Phenix-nature, aged grown, To a better being shall aspire, Mounting herself, like him, to eternity in fire." - Cowley Elijah had once, in a passion, wished he might die; yet God was so gracious to him as not only not to take him at his word then, but to honour him with this singular privilege, that he should never see death; and by this instance, and that of Enoch, (1.) God showed how men should have left the world if they had not sinned, not by death, but by a translation. (2.) He gave a glimpse of that life and immortality which are brought to light by the gospel, of the glory reserved for the bodies of the saints, and the opening of the kingdom of heaven to all believers, as then to Elijah. It was also a figure of Christ's ascension. III. Elisha pathetically laments the loss of that great prophet, but attends him with an ecomium, Kg2 2:12. 1. He saw it; thus he received the sign by which he was assured of the grant of his request for a double portion of Elijah's spirit. He looked stedfastly towards heaven, whence he was to expect that gift, as the disciples did, Act 1:10. he saw it awhile, but the vision was presently out of his sight; and he saw him no more. 2. He rent his own clothes, in token of the sense he had of his own and the public loss. Though Elijah had gone triumphantly to heaven, yet this world could ill spare him, and therefore his removal ought to be much regretted by the survivors. Surely their hearts are hard whose eyes are dry when God, by taking away faithful useful men, calls for weeping and mourning. Though Elijah's departure made way for Elisha's eminency, especially since he was now sure of a double portion of his spirit, yet he lamented the loss of him, for he loved him, and could have served him for ever. 3. He gave him a very honourable character, as the reason why he thus lamented the loss of him. (1.) He himself had lost the guide of his youth: My father, my father. He saw his own condition like that of a fatherless child thrown upon the world, and lamented it accordingly. Christ, when he left his disciples, did not leave them orphans (Joh 14:15), but Elijah must. (2.) The public had lost its best guard; he was the chariot of Israel, and the horsemen thereof. He would have brought them all to heaven, as in this chariot, if it had not been their own fault; they used not chariots and horses in their wars, but Elijah was to them, by his counsels, reproofs, and prayers, better than the strongest force of chariot and horse, and kept off the judgments of God. His departure was like the routing of an army, an irreparable loss. "Better have lost all our men of war than this man of God."”
1771
A.D.
John Gill Reformed
1697–1771
“And he said, thou hast asked a hard thing,.... Not a common privilege, but what is rarely enjoyed, and difficult to obtain, few are so favoured of God: nevertheless, if thou see me when I am taken from thee, it shall be so unto thee, but if not, it shall not be so; meaning, that if his rapture was visible to Elisha, and he was favoured with a sight of his assumption, and be an eyewitness of it, this would be a token both to Elijah that it was agreeable to the Lord to ask of him this favour for him, and to Elisha to expect it, otherwise not.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“A double portion of thy spirit be upon me - This in reference to the law, Deu 21:17 : He shall acknowledge the first-born, by giving him a Double Portion of all that he hath-the right of the first-born is his. Elisha considered himself the only child or first-born of Elijah, as the disciples of eminent teachers were called their children; so here he claims a double portion of his spiritual influence, any other disciples coming in for a single share only. Sons of the prophets means no more than the disciples or scholars of the prophets. The original words פי שנים pi shenayim, mean rather two parts, than double the quantity.”
Source
1849
A.D.
1774–1849
“Double spirit. A double portion of thy spirit, as thy eldest son and heir: or thy spirit, which is double, in comparison of that which God usually imparteth to his prophets; (Challoner) or the power of working miracles, as well as of prophesying. (Worthington) — He wishes to excel his fellow disciples, rather than his master. (Tirinus) (Cajetan) (Amama) — Double often means, great and perfect, Jeremias xvii. 18. If Eliseus even begged that he might perform more and greater wonders than his master, (as Christ enabled his disciples to surpass himself, in this particular, John xiv. 12.; Haydock) he might do it without pride, purely for the glory of God. He certainly shone forth with peculiar splendour; and some have enumerated sixteen or twenty-four of his miracles, while they can only find eight (Lyranus) or twelve recorded of Elias. See Cornelius a Lapide, in Ecclesiasticus xlviii. 13. (Calmet) — We read a similar expression in Pindar, (Olym. vi.) where Neptune gave his son Jamus ( Thesauron didumon mantosunas ) “the double treasure of divination,” p. 50. Ed. Step. (Haydock)”
Source
1871
A.D.
1871
“Elijah said unto Elisha, Ask what I shall do for thee--trusting either that it would be in his power to bequeath it, or that God, at his entreaty, would grant it. let a double portion of thy spirit be upon me--This request was not, as is commonly supposed, for the power of working miracles exceeding the magnitude and number of his master's, nor does it mean a higher endowment of the prophetic spirit; for Elisha was neither superior to, nor perhaps equally great with, his predecessor. But the phrase, "a double portion," was applied to the first-born [Deu 21:17], and therefore Elisha's request was, simply, to be heir to the prophetic office and gifts of his master.”
Source
1875
A.D.
Keil & Delitzsch Lutheran
1861–1875
“After crossing the Jordan, Elijah allowed his servant and companion to make one more request before he was taken away, in the full confidence that the Lord would fulfil it in answer to his prayer; and Elisha asked, "Let בּרוּחך פּי־שׁנים, διπλᾶ ἐν πνεύματί σου, i.e., a double portion in (of) thy spirit be granted to me." This request has been misunderstood by many translators, from Ephraem Syrus down to Kster and F. W. Krummacher, who have supposed that Elisha wished to have a double measure of Elijah's spirit ("that thy spirit may be twofold in me:" Luther after the Vulgate, "ut fiat in me duplex spiritus tuus"); and some have taken it as referring to the fact that Elisha performed many more miracles and much greater ones than Elijah (Cler., Pfeiffer, dub. vex. p. 442), others to the gift of prophecy and miracles (Kster, die Proph. p. 82), whilst others, like Krummacher, have understood by it that the spirit of Elisha, as an evangelical spirit, was twice as great as the legal spirit of Elijah. But there is no such meaning implied in the words, nor can it be inferred from the answer of Elijah; whilst it is impossible to show that there was any such measure of the Spirit in the life and works of Elisha in comparison with the spirit of Elisha, although his request was fulfilled. The request of Elisha is evidently based upon Deu 21:17, where בּ פּי־שׁנים denotes the double portion which the first-born received in (of) the father's inheritance, as R. Levi b. Gers., Seb. Mnst., Vatabl., Grot., and others have perceived, and as Hengstenberg (Beitrr. ii. p. 133f.) in our days has once more proved. Elisha, resting his foot upon this law, requested of Elijah as a first-born son the double portion of his spirit for his inheritance. Elisha looked upon himself as the first-born son of Elijah in relation to the other "sons of the prophets," inasmuch as Elijah by the command of God had called him to be his successor and to carry on his work. The answer of Elijah agrees with this: "Thou hast asked a hard thing," he said, because the granting of this request was not in his power, but in the power of God. He therefore made its fulfilment dependent upon a condition, which did not rest with himself, but was under the control of God: "if thou shalt see me taken from thee (לקּח, partic. Pual with the מ dropped, see Ges. 52, Anm. b; Ewald, 169, d.), let it be so to thee; but if not, it will not be so." From his own personal inclination Elijah did not wish to have Elisha, who was so closely related to him, as an eye-witness of his translation from the earth; but from his persistent refusal to leave him he could already see that he would not be able to send him away. He therefore left the matter to the Lord, and made the guidance of God the sign for Elisha whether the Lord would fulfil his request or not. Moreover, the request itself even on the part of the petitioner presupposes a certain dependence, and for this reason Elisha could not possibly desire that the double measure of Elijah's spirit should be bestowed upon him. A dying man cannot leave to his heir more than he has himself. And, lastly, even the ministry of Elisha, when compared with that of Elijah, has all the appearance of being subordinate to it. He lives and labours merely as the continuer of the work already begun by Elijah, both outwardly in relation to the worshippers of idols, and inwardly in relation to the disciples of the prophets. Elisha performs the anointing of Jehu and Hazael, with which Elijah was charged, and thereby prepares the way for the realization of that destruction of Ahab's house which Elijah predicted to the king; and he merely receives and fosters those schools of the prophets which Elijah had already founded. And again, it is not Elisha but Elijah who appears as the Coryphaeus of prophecy along with Moses, the representative of the law, upon the mount of transfiguration (Mat 17:3). - It is only a thoroughly external mode of observation that can discover in the fact that Elisha performed a greater number of miracles than Elijah, a proof that the spirit of Elijah rested doubly upon him.”
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.