Deuteronomy 32:44-47

44So Moses came with Joshua the son of Nun and spoke all the words of this song in the hearing of the people.

45Moses finished speaking all these words to all Israel,

46and he said to them: “Set your hearts on all the words which I testify among you today, which you shall command your children to be careful to observe—all the words of this law.

47For it is not a futile thing for you, because it is your life, and by this word you shall prolong your days in the land which you cross over the Jordan to possess.”