*Minor differences ignored. Grouped by changes, with first version listed as example.
He asked life from thee. This verse confirms what I have formerly said, that this psalm is not to be limited to the person of any one man. David's life, it is true, was prolonged to an advanced period, so that, when he departed from this world, he was an old man, and full of days; but the course of his life was too short to be compared to this length of days, which is said to consist of many ages. Even if we reckon the time from the commencement of David's reign to the captivity of Babylon, this length of days will not be made up and completed in all David's successors. David, therefore, without doubt, comprehends the Eternal King. There is here a tacit comparison between the beginnings of this kingdom, which were obscure and contemptible, or rather which were fraught with the most grievous perils, and which bordered on despair; and the incredible glory which followed, when God, exempting it from the common lot of other kingdoms, elevated it almost above the heavens. For it is no ordinary commendation of this kingdom, when it is said, that it shall endure as long as the sun and moon shall shine in the heavens, (Psalm 72:1.) David, therefore, in saying that he asked life, tacitly points to the distressed circumstances to which he had often been reduced; and the meaning is, Lord, since the time thou hast called thy servant to the hope of the kingdom by thy holy anointing, his condition has been such that he has accounted it a singular blessing to be rescued from the jaws of death; but now, he has not only, by thy grace, escaped in safety the dangers which threatened his life: thou hast also promised that his kingdom will be continued for many ages in his successors. And it serves not a little to magnify the grace of God, that he vouchsafed to confer on a poor and miserable man, who was almost at the point of death, not only his life, - when, amidst the dangers which threatened it, he tremblingly asked merely its preservations -- but also the inestimable honor of elevating him to the royal dignity, and of transmitting the kingdom to his posterity for ever. Some expound the verse thus:-- Thou hast given him the life which he asked, even to the prolonging of his days for ever and ever. But this seems to me a cold and strained interpretation. We must keep in view the contrast which, as I have said, is here made between the weak and contemptible beginnings of the kingdom, and the unexpected honor which God conferred upon his servant, in calling the moon to witness that his seed should never fail. The same has been exemplified in Christ, who, from contempt, ignominy, death, the grave, and despair, was raised up by his Father to the sovereignty of heaven, to sit at the Father's right hand for ever, and at length to be the judge of the world.
He asked life of thee - An expression similar to this occurs in Psalm 61:5-6, "For thou, O God, hast heard my vows;...Thou wilt prolong the king's life, and his years to many generations." The expression in both cases implies that there had been a prayer for "life," as if life were in danger. The expression itself would be applicable to a time of sickness, or to danger of any kind, and here it is used doubtless in reference to the exposure of life in going into battle, or in going forth to war. In this apprehended peril he prayed that God would defend him. He earnestly sought protection as he went forth to the perils of war.
And thou gavest it him - Thou didst hear and answer his prayer. He was saved from danger.
Even length of days forever and ever - Thou didst grant him more than he asked. He sought life for himself; thou bast not only granted that, but hast granted to him the assurance that he should live in his posterity to all generations. The idea is, that there would be an indefinite contination of his race. His posterity would occupy his throne, and there would be no end to his reign thus prolonged. Beyond all his petitions and his hopes, God bad given the assurance that his reign would be permanent and enduring. We cannot suppose that he understood this as if it were a promise made to him personally, that "he" would live and would occupy the throne forever; but the natural interpretation is that which would refer it to his posterity, and to the perpetuity of the reign of his family or descendants. A similar promise occurs elsewhere: 2-Samuel 7:13, 2-Samuel 7:16; compare the notes at Psalm 18:50. It is by no means an uncommon thing that God gives us more than we asked in our prayers. The offering of prayer is not only the means of securing the blessing which we asked, but also often of securing much more important blessings which we did not ask. If the expression were allowable it might be said that the prayer "suggested" to the divine mind the conferring of all needed blessings, or it indicates such a state of mind on the part of him who prays that God "takes occasion" to confer blessings which were not asked; as a request made by a child to a parent for a specific favor is followed not only by granting "that" favor, but by bestowing others of which the child did not think. The state of mind on the part of the child was such as to "dispose" the parent to grant much larger blessings.
He asked life of thee - This verse has caused some interpreters to understand the Psalm of Hezekiah's sickness, recovery, and the promised addition to his life of fifteen years; but it may be more literally understood of the Messiah, of whom David was the type, and in several respects the representative.
(c) He asked life of thee, [and] thou gavest [it] him, [even] length of days for ever and ever.
(c) David not only obtained life, but also assurance that his posterity would reign forever.
He asked life of thee, and thou gavest it him,.... Both for himself, as man, when he was about to die, that he might be raised to life again, which was granted him; and for his people, that they might live spiritually and eternally, and accordingly life is given to him for them; and he has power to give it to as many as the Father has given him, John 17:2;
even length of days for ever and ever; the life he has for himself as man is what will ever continue; he will die no more, death will have no more dominion over him; he will live for evermore, and that to make intercession for his members, Romans 6:9; and the life which is granted them at his request is an everlasting one, both as to body and soul; for though they die as other men, they shall live again in the resurrection of the just, and never die more, but shall be like the angels in heaven; and as for the second death, that shall not harm them, nor have any power over them; they will live and reign with Christ for ever.
(Compare 2-Samuel 7:13-16). The glory and blessedness of the king as head of his line, including Christ, as well as in being God's specially selected servant, exceeded that of all others.
For ever - Thou gavest him a long life and reign here, and after that didst translate him to live with thee for ever. But this was more eminently fulfilled in Christ, who asked of his father, life, or to be saved from death, Hebrews 5:7, though with submission to his will: but his father, though he saw it necessary to take away his temporal life, yet instantly gave him another, far more noble, even the perfect possession of an everlasting life both in his soul and body, at his right hand.
*More commentary available at chapter level.