Deuteronomy 32:43-47

Rejoice, O ye nations, with his people: for he will avenge the blood of his servants, and will render vengeance to his adversaries, and will be merciful unto his land, and to his people.

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

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

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

For it is not a vain thing for you; because it is your life: and through this thing ye shall prolong your days in the land, whither ye go over Jordan to possess it.