Train up a child in the way he should go: and when he is old, he will not depart from it" (Proverbs 22:6).
"You shall teach them diligently to your children impressing God's precepts on their minds and penetrating their hearts with His truths], and shall speak of them when you sit in your house, and when you walk on the road, and when you lie down and when you get up" (Deuteronomy 6:7).