Proverbs 26:4-7

New International Version - UK

⁴ Do not answer a fool according to his folly,
    or you yourself will be just like him.
⁵ Answer a fool according to his folly,
    or he will be wise in his own eyes.
⁶ Sending a message by the hands of a fool
    is like cutting off one’s feet or drinking poison.
⁷ Like the useless legs of one who is lame
    is a proverb in the mouth of a fool.