Matthew 18:15-17

Thomson(i) 15 Wherefore if thy brother trespass against thee, go and expostulate with him when thou and he are alone. If he hearken to thee thou hast gained thy brother. 16 But if he will not hearken to thee, then take with thee one or two, that by the testimony of two or three witnesses everything may be ascertained; 17 And if he disregard them, tell the congregation; and if he disregard the congregation, let him be to thee as the heathen and the publican.