Proverbs 26:5-7

New Revised Standard Version, Anglicised

⁵ Answer fools according to their folly,
    or they will be wise in their own eyes.
⁶ It is like cutting off one’s foot and drinking down violence,
    to send a message by a fool.
⁷ The legs of a disabled person hang limp;
    so does a proverb in the mouth of a fool.