Deuteronomy 32:35-41

35Vengeance is mine, and recompense, for the time when their foot shall slip; for the day of their calamity is at hand, and their doom comes swiftly.'

36For the Lord will vindicate his people and have compassion on his servants, when he sees that their power is gone and there is none remaining, bond or free.

37Then he will say, 'Where are their gods, the rock in which they took refuge,

38who ate the fat of their sacrifices and drank the wine of their drink offering? Let them rise up and help you; let them be your protection!

39"'See now that I, even I, am he, and there is no god beside me; I kill and I make alive; I wound and I heal; and there is none that can deliver out of my hand.

40For I lift up my hand to heaven and swear, As I live forever,

41if I sharpen my flashing sword and my hand takes hold on judgment, I will take vengeance on my adversaries and will repay those who hate me.