Deuteronomy 32:41-47

41If I whet my glittering sword, And mine hand take hold on judgment; I will render vengeance to mine adversaries, And will recompense them that hate me.

42I will make mine 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.

43Rejoice, O ye nations, with his people: For he will avenge the blood of his servants, And will render vengeance to his adversaries, And will make expiation for his land, for his people.

44And Moses came and spake all the words of this song in the ears of the people, he, and Hoshea the son of Nun.

45And Moses made an end of speaking all these words to all Israel:

46And he said unto them, Set your heart unto all the words which I testify unto you this day; which ye shall command your children, to observe to do all the words of this law.

47For it is no vain thing for you; because it is your life, and through this thing ye shall prolong your days upon the land, whither ye go over Jordan to possess it.