1 Peter 2:15

For so is the will of God, that with well-doing ye may put to silence the ignorance of foolish men. The Gentiles speak against the Christians as evil-doers; they are to put their accusers to silence by well-doing; this is to be their answer rather than indignant self-vindication. The Greek word rendered "put to silence" ( φιμοῦν ) means literally "to muzzle". The word for "ignorance" ( ἀγνωσία ) occurs, besides this passage, only in 1 Corinthians 15:34 , where it evidently means "culpable, self-caused ignorance." The word for "foolish" ( ἄφρων ) is a strong one—it means "senseless". Here it has the article, "the foolish men," i.e. those "who speak against you as evil-doers."