Proverbs 26:5 in the World English Bible
Answer a fool according to his folly, lest he be wise in his own eyes.
Context
4 Answer not a fool according to his folly, lest thou also be like unto him.
5 Answer a fool according to his folly, lest he be wise in his own conceit.
6 He that sendeth a message by the hand of a fool cutteth off the feet, and drinketh damage.