Deuteronomy 4:9

Only take heed to thyself and keep thy soul diligently, lest thou forget the things which thine eyes have seen, the miracles and the many evidences of God's presence during the years of the wilderness journey, and lest they depart from thy heart all the days of thy life, that is, for so much as one minute; but teach them thy sons, thy children, and thy sons' sons, thy grandchildren, the command thus including three points: to remember, to observe, and to transmit in its integrity;