Deuteronomy 4:9
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
6Keep therefore and do for this your wisdom and your understanding in the sight of the nations, which shall hear all these statutes, and say, Surely this great nation a wise and understanding people.
7For what nation great, who God nigh unto them, as the LORD our God in all we call upon him
8And what nation great, that hath statutes and judgments righteous as all this law, which I set before you this day?
9Only 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;
10the day that thou stoodest before the LORD thy God in Horeb, when the LORD said unto me, Gather me the people together, and I will make them hear my words, that they may learn to fear me all the days that they shall live upon the earth, and they may teach their children.
11And ye came near and stood under the mountain; and the mountain burned with fire unto the midst of heaven, with darkness, clouds, and thick darkness.
12And the LORD spake unto you out of the midst of the fire: ye heard the voice of the words, but saw no similitude; only a voice.