Deuteronomy 6: 5-9
Love the LORD your God with all your heart and with all your soul and with all your strength. 6 These commandments that I give you today are to be on your hearts. 7 Impress them on your children. Talk about them when you sit at home and when you walk along the road, when you lie down and when you get up. 8 Tie them as symbols on your hands and bind them on your foreheads. 9 Write them on the doorframes of your houses and on your gates.
Start children off on the way they should go, and even when they are old they will not turn from it.
Jesus said, “Let the little children come to me, and do not hinder them, for the kingdom of heaven belongs to such as these.”