Proverbs 17:25-27

Authorized (King James) Version

²⁵ A foolish son is a grief to his father,
    and bitterness to her that bare him.

²⁶ Also to punish the just is not good,
    nor to strike princes for equity.

²⁷ He that hath knowledge spareth his words:
    and a man of understanding is of an excellent spirit.