MAT 18:17

17 If the one who has sinned against you will not listen to them [or does not feel sorry that he has sinned against you], tell that to the congregation [so that they can rebuke him]. If that person will not listen to the congregation [or feel sorry that he has sinned against you, exclude him from being a member of your congregation, just like] you [would exclude] pagans, tax collectors, [and others who do not believe in God and sin greatly].