Proverbs 17:27-28

²⁷He that measureth his words, is wise and prudent; and a learned man is of precious spirit. (He who measureth his words, is wise and prudent; and a learned person hath a precious spirit.)

²⁸Also a fool, if he is still, shall be guessed a wise man, (or Even a fool, if he is silent, shall be thought to be wise); and, if he presseth together his lips, he is guessed an understanding man.