1 Corinthians 5:2-6

You have become arrogant and have not mourned instead, so that the one who had done this deed would be removed from your midst.

For I, on my part, though absent in body but present in spirit, have already judged him who has so committed this, as though I were present.

In the name of our Lord Jesus, when you are assembled, and I with you in spirit, with the power of our Lord Jesus,

I have decided to turn such a person over to Satan for the destruction of his body, so that his spirit may be saved on the day of the Lord.

Your boasting is not good. Do you not know that a little leaven leavens the whole lump of dough?