Psalms 21:4 - Coke's Commentary on the Holy Bible

He asked life— New life from the dead; his resurrection; the same that is meant by his heart's desire, Psalms 21:2. Isaiah says, When thou shalt make his soul an offering for sin, he shall prolong his days. Length of days for ever and ever, is an expression which, however some understand of David and his successors on the throne, can with no degree of propriety belong to him or to them, but as referring to that king for ever, who was of the lineage of David, and of whose kingdom there shall be no end. See Luke 1:32-33.