David
Psalm 21:6ESV·traditional attribution

For you make him most blessed forever; you make him glad with the joy of your presence.

John Calvin Reformed @genevareformer

PSALM 21. This psalm contains a public and solemn thanksgiving for the prosperous and happy condition of the king. Its subject is almost the same with that of the preceding. “What was anticipated in the preceding psalm, the present poem appears to celebrate as having been achieved.” — Drake’s Harp of Judah.

Commenting on Psalm 21:1-13

C.H. Spurgeon Reformed Baptist @princeofpreachers

"For thou hast made him most blessed for ever." He is most blessed in himself, for he is God over all, blessed for ever; but this relates to him as our Mediator, in which capacity blessedness is given to him as a reward. The margin has it, thou hast set him to be blessings; he is an overflowing wellspring of blessings to others, a sun filling the universe with light.

Matthew Henry Presbyterian @wholebiblehenry

David here speaks for himself in the first place, professing that his joy was in God's strength and in his salvation, and not in the strength or success of his armies. He also directs his subjects herein to rejoice with him, and to give God all the glory of the victories he had obtained; and all with an eye to Christ, of whose triumphs over...

Commenting on Psalm 21:1-6