Moses
Psalm 89:23BSB·traditional attribution

I will crush his foes before him and strike down those who hate him.

John Calvin Reformed @genevareformer

PSALM 89 The prophet who wrote this psalm, whoever he was, in approaching the throne of grace to make supplication to God in behalf of the afflicted Church, lays down, as an encouragement both to himself and the rest of the faithful to cherish good hope, the covenant which God had made with David.

Commenting on Psalm 89:1-52

C.H. Spurgeon Reformed Baptist @princeofpreachers

And I will beat down his foes before his face —crushing them and their plans. God himself thus fights the battles of his Son, and effectually overturns his foes. And plague them that hate him, or smite his haters. May none of us learn the terror of this threatening, which is surely being fulfilled upon all those unbelievers who have rejected the Son of God...

Matthew Henry Presbyterian @wholebiblehenry

The covenant God made with David and his seed was mentioned before (Psa 89:3, Psa 89:4); but in these verses it is enlarged upon, and pleaded with God, for favour to the royal family, now almost sunk and ruined; yet certainly it looks at Christ, and has its accomplishment in him much more than in David; nay, some passages here are scarcely applicable at all...

Commenting on Psalm 89:19-37