Matthew 5:23-25; Matthew 18:15-17
“Therefore, if you are offering your gift at the altar and there remember that your brother or sister has something against you,
leave your gift there in front of the altar. First go and be reconciled to them; then come and offer your gift.
“Settle matters quickly with your adversary who is taking you to court. Do it while you are still together on the way, or your adversary may hand you over to the judge, and the judge may hand you over to the officer, and you may be thrown into prison.
“If your brother or sister sins, go and point out their fault, just between the two of you. If they listen to you, you have won them over.
But if they will not listen, take one or two others along, so that ‘every matter may be established by the testimony of two or three witnesses.’
If they still refuse to listen, tell it to the church; and if they refuse to listen even to the church, treat them as you would a pagan or a tax collector.