1 Corinthians 5:1-5 New Revised Standard Version (NRSV)
Sexual Immorality Defiles the Church
5 It is actually reported that there is sexual immorality among you, and of a kind that is not found even among pagans; for a man is living with his father’s wife. 2 And you are arrogant! Should you not rather have mourned, so that he who has done this would have been removed from among you?
3 For though absent in body, I am present in spirit; and as if present I have already pronounced judgment 4 in the name of the Lord Jesus on the man who has done such a thing.[a] When you are assembled, and my spirit is present with the power of our Lord Jesus, 5 you are to hand this man over to Satan for the destruction of the flesh, so that his spirit may be saved in the day of the Lord.[b]