Matthew 18:15-17

“Now if your brother sins against you, go and show him his fault while you’re with him alone. If he listens to you, you have won your brother. But if he does not listen, take with you one or two more, so that ‘by the mouth of two or three witnesses every word may stand.’ But if he refuses to listen to them, tell it to Messiah’s community. And if he refuses to listen even to Messiah’s community, let him be to you as a pagan and a tax collector.