Children: should be Instructed in the Ways of God
Source: TTT
Deuteronomy 31:12, 13
Assemble the people—men, women, children, and the foreigners within your gates—so that they may listen and learn to fear the LORD your God and to follow carefully all the words of this law. / Then their children who do not know the law will listen and learn to fear the LORD your God, as long as you live in the land that you are crossing the Jordan to possess.”
Proverbs 22:6
Train up a child in the way he should go, and when he is old he will not depart from it.