Psalms 21:4 - Joseph Benson’s Commentary on the Old and New Testaments

He asked life of thee Applied to David it means, He asked only the preservation of his short and mortal life, which was often exposed to the utmost perils. And thou gavest him length of days for ever and 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 far 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, and that far more noble, instead of it, even the perfect possession of an everlasting and most glorious life, both in his soul and body, at his right hand.