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17Now I beg you, brothers, mark those who are causing the divisions and occasions of stumbling, contrary to the doctrine which you learned, and turn away from them. 18For those who are such don`t serve our Lord, Jesus Christ, but their own belly; and by their smooth and flattering speech, they deceive the hearts of the innocent. 19For your obedience has reached all. I rejoice therefore over you. But I desire to have you wise to that which is good, but innocent to that which is evil.
Romans 16:17-19 (WEB)