Proverbs 22:6 KJV
Train up a child in the way he should go: and when he is old, he will not depart from it.
Deuteronomy 7:3-4 KJV
Neither shalt thou make marriages with them; thy daughter thou shalt not give unto his son, nor his daughter shalt thou take unto thy son.  For they will turn away thy son from following me, that they may serve other gods: so will the anger of the Lord be kindled against you, and destroy thee suddenly.
Psalm 127:4-5 KJV
As arrows are in the hand of a mighty man; so are children of the youth.  Happy is the man that hath his quiver full of them: they shall not be ashamed, but they shall speak with the enemies in the gate..
Matthew 10:35-36 NIV
For I have come to turn “ ‘a man against his father, a daughter against her mother, a daughter-in-law against her mother-in-law—  a man’s enemies will be the members of his own household.’