Deuteronomy 32:41 in the King James Version
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.
Context
40 For I lift up my hand to heaven and declare, as I live forever,
41 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.
42 I will make my arrows drunk with blood. My sword shall devour flesh with the blood of the slain and the captives, from the head of the leaders of the enemy.”