Deuteronomy 32
46 Ref He said to them, Set your heart to all the words which I testify to you this day, which you shall command your children to observe to do, [even] all the words of this law.
47 Ref For it is no vain thing for you; because it is your life, and through this thing you shall prolong your days in the land, where you go over the Jordan to possess it.