Proverbs 26:2-5

²As the sparrow in her wandering, as the swallow in her flying, So the curse that is causeless alighteth not.

³A whip for the horse, a bridle for the ass, And a rod for the back of fools.

⁴Answer not a fool according to his folly, Lest thou also be like unto him.

⁵Answer a fool according to his folly, Lest he be wise in his own conceit.