To damage a parent or child, all you must do is crush their voice.
Ephesians 6:1-4 – Children, obey your parents in the Lord, for this is right. “Honor your father and mother”—which is the first commandment with a promise— “so that it may go well with you and that you may enjoy long life on the earth. Fathers, do not exasperate your children; instead, bring them up in the training and instruction of the Lord.
Proverbs 22:6 – Start children off on the way they should go, and even when they are old they will not turn from it.