David’s Song of Praise (5)
2 Samuel 22:47
King David now concludes his prayer, giving all praise and glory to the Lord God his Savior. Nothing here is held back as this elect man contemplates the depth and breadth of God’s salvation.
47 “The Lord lives! Praise be to my Rock!
Exalted be my God, the Rock, my Savior!
48 He is the God who avenges me,
who puts the nations under me,
49 who sets me free from my enemies.
You exalted me above my foes;
from a violent man you rescued me.
50 Therefore I will praise you, Lord, among the nations;
I will sing the praises of your name.
51 “He gives his king great victories;
he shows unfailing kindness to his anointed,
to David and his descendants forever.”
I can do no better than allowing John Calvin to have the last word. Recall that Psalm 18 is an almost exact duplication of this prayer from 2 Samuel 22. Note that what Calvin’s translation rendered as “seed,” the NIV has rendered as “descendants.”
And it is to be observed, that by the word seed [descendants] we are not to understand all his descendants indiscriminately; but we are to consider it as particularly referring to that successor of David of whom God had spoken in 2 Samuel 7:12, promising that he would be a father to him. As it had been predicted that his kingdom would continue as long as the sun and the moon should shine in the heavens, the prophecy must necessarily be viewed as descending to him who was to be king not for a time, but for ever. David, therefore, commends his seed [descendants] to us, as honored by that remarkable promise, which fully applies neither to Solomon nor to any other of his successors, but to the only begotten Son of God; as the apostle, in his Epistle to the Hebrews, (Hebrews 1:4,) teaches us, that this is a dignity in which he excels the angels. In conclusion, we shall then only duly profit in the study of this psalm, when we are led by the contemplation of the shadow and type to him who is the substance.
John Calvin commentary on Psalm 18