David
Psalm 89:42ESV·traditional attribution

You have exalted the right hand of his foes; you have made all his enemies rejoice.

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

Thou hast set up the right hand of thy adversaries. Thou hast done it, thou, who hast sworn to give him help and victory, thou hast, instead thereof, sided with his enemies, and lent them thy strength, so that they have gained the supremacy. Thou hast made all his enemies to rejoice. They are boasting over him, and are glorying in his defeat, and this is done by thyself.

Matthew Henry Presbyterian @wholebiblehenry

In these verses we have, I. A very melancholy complaint of the present deplorable state of David's family, which the psalmist thinks hard to be reconciled to the covenant God made with David. "Thou saidst thou wouldst not take away thy lovingkindness, but thou hast cast off." Sometimes, it is no easy thing to reconcile God's providences with his promises, and yet we are sure...

Commenting on Psalm 89:38-52