Matthew 18:15-18

“If your brother sins against you, go to him and show him his fault. But do it privately, just between yourselves. If he listens to you, you have won your brother back. But if he will not listen to you, take one or two other persons with you, so that ‘every accusation may be upheld by the testimony of two or more witnesses,’ as the scripture says. And if he will not listen to them, then tell the whole thing to the church. Finally, if he will not listen to the church, treat him as though he were a pagan or a tax collector. “And so I tell all of you: what you prohibit on earth will be prohibited in heaven, and what you permit on earth will be permitted in heaven.