Matthew 18:15-17

RKJNT(i) 15 If your brother shall sin against you, go and tell him his fault between you and him alone: if he shall hear you, you have gained your brother. 16 But if he will not hear you, then take with you one or two more, that by the testimony of two or three witnesses every word may be established. 17 And if he refuses to hear them, tell it to the church: but if he even refuses to hear the church, let him be to you as a Gentile and a tax gatherer.