Deuteronomy 32:47
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.”
World English Bible (Public Domain)
In context
Before · Deuteronomy 32:45–46
45Moses finished reciting all these words to all Israel. 46He said to them, “Set your heart to all the words which I testify to you today, which you shall command your children to observe to do, all the words of this law.
47For 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.”