Deuteronomy 4:9 in the King James Version
Only take heed to thyself, and keep thy soul diligently, lest thou forget the things which thine eyes have seen, and lest they depart from thy heart all the days of thy life: but teach them thy sons, and thy sons’ sons;
Context
8 What great nation is there that has statutes and ordinances so righteous as all this law which I set before you today?
9 Only be careful, and keep your soul diligently, lest you forget the things which your eyes saw, and lest they depart from your heart all the days of your life; but make them known to your children and your children’s children—
10 the day that you stood before the LORD your God in Horeb, when the LORD said to me, “Assemble the people to me, and I will make them hear my words, that they may learn to fear me all the days that they live on the earth, and that they may teach their children.”