Matthew 18:16-17

New Revised Standard Version Catholic Edition

¹⁶ But if you are not listened to, take one or two others along with you, so that every word may be confirmed by the evidence of two or three witnesses. ¹⁷ If the member refuses to listen to them, tell it to the church; and if the offender refuses to listen even to the church, let such a one be to you as a Gentile and a tax collector.