1 Corinthians 5:1-5

"It is actually reported that there is sexual immorality among you, and of a kind that does not occur even among pagans: A man has his father's wife. And you are proud! Shouldn't you rather have been filled with grief and have put out of your fellowship the man who did this? Even though I am not physically present, I am with you in spirit. And I have already passed judgment on the one who did this, just as if I were present. When you are assembled in the name of our Lord Jesus and I am with you in spirit, and the power of our Lord Jesus is present, hand this man over to Satan, so that the sinful nature may be destroyed and his spirit saved on the day of the Lord."

Expel the immoral brother!

Putting someone out of the church should be a last resort in disciplinary action. It should not be done out of vengeance, but out of love, just as parents punish the children they love to restore them. The church's role should be to help, not hurt, offenders, motivating them to repent of their sins and to return to the fellowship of the church.