Deuteronomy 32:40-42

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

41 if 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.

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 long-haired heads of the enemy.'