And perfect the same which thy right hand hath planted: and upon the son of man whom thou hast confirmed for thyself.

“Psalm 79 [LXX] is similarly titled "For the things that shall be changed." In this psalm, among other things, is written, "look down from heaven and see; visit this vineyard and perfect what your right hand has planted and on the son of man whom you have confirmed for yourself." This is the vineyard of which it is said, "You have brought a vineyard out of Egypt." Christ did not plant another; by his coming he changed that one into a better vineyard. Accordingly, we find in the Gospel: "He will utterly destroy those evil men, and will let out the vineyard to other vine dressers." The Gospel does not say, "He will uproot and will plant another," but "this same vineyard he will let out to other vine dressers." The city of God and congregation of the children of promise must be filled with the same community of saints by the death and succession of mortal beings and at the end of the world will receive its due immortality in all people. This same thought is expressed differently by means of the fruitful olive tree in another psalm, which says, "But I as a fruitful olive tree in the house of God, have hoped in the mercy of God forever, yea, for ever and ever." It was not because the unbelievers and the proud had been broken away and the branches were on that account unfruitful and the wild olive of the Gentiles was ingrafted that the root of the patriarchs and prophets died. Isaiah says, "For if your people, O Israel, shall be as the sand of the sea, a remnant of them shall be saved," but through him about whom the psalm says, "and on the son of man whom you have confirmed for yourself," and about whom is reiterated, "Let your hand be on the man of your right hand: and on the son of man whom you have confirmed for yourself. And we depart not from you." Through this Son of man, Christ Jesus, and from his remnant, that is, the apostles and the many others from among the Israelites who have believed in Christ as God, and with the increasing number of Gentiles, the holy vineyard is being completed. Thus, in the passing of the old rites and in the institution of the new, the title of the psalm, "For the things that shall be changed," is fulfilled.”

“And of the foundation that Your right hand has planted Which is founded and established, which Your right hand has planted, an expression of (Gen. 40:13): “and restore you to your office (כנך) .” and over the son You have strengthened for Yourself And over Esau, who was a beloved son to this father, who would call him, “my son.” You strengthened the vine of Jacob for Yourself, as it is said (Gen. 27:40): “and You will serve your brother.” Now it is...”

“Let thy hand be upon the man of thy right hand,.... Which some understand of the people of Israel in general, beloved, supported, and strengthened, by the Lord: and others of the then king of Israel, or Judah, the vinedresser, or keeper of the vineyard under God; praying that he might be directed, supported, and protected, by the Lord; but it seems better to understand it with R. Obadiah on the place, and Abarbinel (x) of the Messiah; and so Aben Ezra interprets it either of Israel, or of Messiah the son of Ephraim. Christ is called the "man", though as yet he was not really man, because it was purposed and promised that he should; and he had agreed to become man, and had appeared often in an human form; and it was certain that he would be incarnate: and also the man of God's "right hand", which is expressive of the power of God, because by him, who, in time, became man, even the Son of God, the world, and all things in it, were made; and by him all things are upheld in their being; by him his people were to be redeemed, and have been redeemed from all their enemies; and by him they are upheld, kept, and preserved from a final and total falling away, and will be raised at the last day: and the phrase may design the support and strength the human nature of Christ, which was weak in itself, was to have, and had, not only from its union in the Son of God, but from God the Father; who promised and gave support and strength to it, under all the sufferings endured in it: to which may be added, that this phrase is expressive of love and affection; so Benjamin had his name, which signifies the son of the right hand, from the great affection of his father; so Christ is the Son of God's love, his dear and well beloved Son; as appears by hiding nothing from him, by putting all things into his hands, and appointing him the Head and Saviour of his people, and the Judge of the world; and his love to him is a love of complacency and delight, is everlasting and unchangeable: moreover, he may be so called, because he was to be, and now is, exalted at the right hand of God, in human nature, as a Prince and Saviour, above angels, authorities, and powers, and above every name whatever: and the prayer is either that the hand of vindictive justice might not be upon the vine, or the church of God, but upon Christ their surety, who was able to bear it, and had engaged to do it; or the hand of divine power and support might be upon him, to strengthen him for the work of redemption and salvation, that so that might prosper in his hand; and the hand of love, grace, and mercy, might be turned upon his people: it is added, upon the son of man, whom thou madest strong for thyself; for the accomplishment of his purposes, promises, and covenant, for the bringing about the salvation of his own people, and for ends of his own glory: the same person is here meant as before; and his being called "the Son of Man", which is a very usual phrase for Christ in the New Testament, and which seems to be taken from hence, and from Dan 7:13, shows that he could not be really from eternity, since he was to be the Son of Man, as he was, of Abraham, David, &c. (x) Mashmiah Jeshuah, fol. 81. 2.”