Mishle 26:3-5

Orthodox Jewish Bible

³ A shot (whip) for the sus, a bridle for the chamor, and a shevet for the back of kesilim.

⁴ Answer not a kesil (fool) according to his folly, lest thou also be like unto him.

⁵ Answer a kesil (fool) according to his folly, lest he be chacham in his own eyes.