Matthew 18:17-20

17If he refuses to listen to them, tell it to the church. If he refuses to listen to the church, treat him like a Gentile or a tax collector.

18“I tell you the truth, whatever you bind on earth will have been bound in heaven, and whatever you release on earth will have been released in heaven.

19Again, I tell you the truth, if two of you on earth agree about whatever you ask, my Father in heaven will do it for you.

20For where two or three are assembled in my name, I am there among them.”