Matthew 18:15-17

Twentieth_Century(i) 15 If your Brother does wrong, go to him and convince him of his fault when you and he are alone. If he listens to you, you have won your Brother. 16 But, if he does not listen to you, take with you one or two others, so that 'on the evidence of two or three witnesses, every word may be put beyond dispute.' 17 If he refuses to listen to them, speak to the Church; and, if he also refuses to listen to the Church, treat him as you would a Gentile or a tax-gatherer.