Proverbs 26:2-4

New Revised Standard Version Updated Edition

² Like a sparrow in its flitting, like a swallow in its flying,
    an undeserved curse goes nowhere.^(A)
3 A whip for the horse, a bridle for the donkey,
    and a rod for the back of fools.^(B)
4 Do not answer fools according to their folly,
    lest you be a fool yourself.^(C)