Deuteronomy 32:41-43

41 if I whet my glittering sword, and my hand takes hold on judgment, I will render vengeance to my adversaries, and will recompense those who hate me.

42 I will make my arrows drunk with blood, and my sword shall devour flesh, with the blood of the slain and the captives, from the head of the leaders of the enemy.

43 Rejoice, O ye Gentiles, with his people. For he will avenge the blood of his servants, and will render vengeance to his adversaries, and will recompense those who hate him, and will make expiation for his land, for his people.