Deuteronomy 32:45-48

Moses finished speaking all these words to all Israel, and 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. For 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.” Then the LORD spoke to Moses that very same day, saying