Proverbs 26:4-6

Complete Jewish Bible

⁴ Don’t answer a fool in terms of his folly,
    or you will be descending to his level;
⁵ but answer a fool as his folly deserves,
    so that he won’t think he is wise.
⁶ Telling a message to a fool and sending him out
    is like cutting off one’s feet and drinking violence.