Ps 80:13

“"If My people would have heard Me, if Israel would have walked in My ways" [Psalm 81:13]. For perchance that Israel says, Behold I sin, it is manifest, I go after the affections of my own heart: but what can I do? The devil does this. Demons do this. What is the devil? Who are the demons? Certainly your enemies. "Unto nothing all their enemies I would have brought down; and on them that oppress them I would have sent forth My hand" [Psalm 81:14]. But now what have they to do to complain of enemies? Themselves have become the worse enemies. For how? What follows? Of enemies ye complain, yourselves, what are you?”

“"If my people listened to me, if Israel traveled in my ways, I would have reduced their foes to nothing and laid my hand on those afflicting them." If they had adhered to my advice and followed my commandments, I would easily have destroyed their foes. "To nothing" suggests the facility—in other words, easily and without trouble I would have been able to bring about their ruin in an instant.”