Deuteronomy 32:41 in the World English Bible
if I sharpen my glittering sword, my hand grasps it in judgment; I will take vengeance on my adversaries, and will repay those who hate me.
Context
40 For I lift up my hand to heaven, and say, I live for ever.
41 If I whet my glittering sword, and mine hand take hold on judgment; I will render vengeance to mine enemies, and will reward them that hate me.
42 I will make mine arrows drunk with blood, and my sword shall devour flesh; and that with the blood of the slain and of the captives, from the beginning of revenges upon the enemy.