1 Corinthians 5:4

For what have I to do with judging outsiders? Are you not to judge those who are within the church?

Sufficient for such a one is this punishment which was inflicted by the majority,

But one whom you graciously forgive anything, I graciously forgive also. For indeed what I have graciously forgiven, if I have graciously forgiven anything, I did it for your sakes in the presence of Christ,

since you are seeking proof that Christ speaks in me; He is not weak toward you, but mighty in you.

For this reason I am writing these things while absent, so that when present I need not use severity, in accordance with the authority which the Lord gave me for building up and not for tearing down.

Now we command you, brothers, in the name of our Lord Jesus Christ, that you keep away from every brother who walks in an unruly manner and not according to the tradition which they received from us.