Deuteronomy 32:40-42

I raise my hand toward heaven and make this promise: As surely as I live forever, I will sharpen my flashing sword, and I will take it in my hand to judge. I will punish my enemies and pay back those who hate me. My arrows will be covered with their blood; my sword will eat their flesh. The blood will flow from those who are killed and the captives. The heads of the enemy leaders will be cut off.”