David
Psalm 81:12ESV·traditional attribution

So I gave them over to their stubborn hearts, to follow their own counsels.

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

So I gave them up unto their own hearts' lust. No punishment is more just or more severe than this. If men will not be checked, but madly take the bit between their teeth and refuse obedience, who shall wonder if the reins are thrown upon their necks, and they are let alone to work out their own destruction.

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