Matthew 5:23-25; Matthew 18:15-17
“So if you are presenting a sacrifice at the altar in the Temple and you suddenly remember that someone has something against you,
leave your sacrifice there at the altar. Go and be reconciled to that person. Then come and offer your sacrifice to God.
“When you are on the way to court with your adversary, settle your differences quickly. Otherwise, your accuser may hand you over to the judge, who will hand you over to an officer, and you will be thrown into prison.
“If another believer sins against you, go privately and point out the offense. If the other person listens and confesses it, you have won that person back.
But if you are unsuccessful, take one or two others with you and go back again, so that everything you say may be confirmed by two or three witnesses.
If the person still refuses to listen, take your case to the church. Then if he or she won’t accept the church’s decision, treat that person as a pagan or a corrupt tax collector.