Deuteronomy 4:9-10

9“But watch out! Be careful never to forget what you yourself have seen. Do not let these memories escape from your mind as long as you live! And be sure to pass them on to your children and grandchildren.

10Never forget the day when you stood before the Lord your God at Mount Sinai, where he told me, ‘Summon the people before me, and I will personally instruct them. Then they will learn to fear me as long as they live, and they will teach their children to fear me also.’