Matthew 5:23-25; Matthew 18:15-17
"So if you are standing before the altar in the Temple, offering a sacrifice to God, and you suddenly remember that someone has something against you,
leave your sacrifice there beside the altar. Go and be reconciled to that person. Then come and offer your sacrifice to God.
Come to terms quickly with your enemy before it is too late and you are dragged into court, handed over to an officer, and thrown in jail.
"If another believer sins against you, go privately and point out the fault. 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 that person still refuses to listen, take your case to the church. If the church decides you are right, but the other person won't accept it, treat that person as a pagan or a corrupt tax collector.