Deuteronomy 32:42-44

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.'

43 "Rejoice with him, O heavens; bow down to him, all gods, for he avenges the blood of his children and takes vengeance on his adversaries. He repays those who hate him and cleanses his people's land."

44 Moses came and recited all the words of this song in the hearing of the people, he and Joshua the son of Nun.