Deuteronomy 32:45-47

When Moses had finished speaking all these words to all [the people of] Israel, he said to them, “Take to heart all the words of warning which I am speaking to you today; and you shall command your children to observe them carefully—to do all the words of this law. For it is not an empty or trivial matter for you; indeed it is your [very] life. By [honoring and obeying] this word you will live long in the land, which you are crossing the Jordan to possess.”