Moses
Psalm 81:14BSB·traditional attribution

how soon I would subdue their enemies and turn My hand against their foes!

John Calvin Reformed @genevareformer

PSALM 81 This psalm consists of two parts. Whoever was its author, he exhorts the people to remember the unparalleled grace of God towards them, in delivering them by his outstretched arm, and choosing them to be a kingdom of priests, and a peculiar Church to himself; that thus they may be excited devoutly to honor their deliverer, both by celebrating his praises, and by leading a holy life.

Commenting on Psalm 81:1-16

C.H. Spurgeon Reformed Baptist @princeofpreachers

I should soon have subdued their enemies. As he did in Egypt overthrow Pharaoh, so would he have baffled every enemy. And turned my hand against their adversaries. He would have smitten them once, and then have dealt them a return blow with the back of his hand. See what we lose by sin. Our enemies find the sharpest weapons against us in the armoury of our transgressions.

Matthew Henry Presbyterian @wholebiblehenry

God, by the psalmist, here speaks to Israel, and in them to us, on whom the ends of the world are come. I. He demands their diligent and serious attention to what he was about to say (Psa 81:8): "Hear, O my people! and who should hear me if my people will not? I have heard and answered thee; now wilt thou hear me?

Commenting on Psalm 81:8-16