1 Corinthians 5:3 - 5:5
3 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: 4 in the name of our Lord Jesus, when you are assembled, and I with you in spirit, with the power of our Lord Jesus, 5 deliver such a one to Satan for the destruction of his flesh, so that his spirit may be saved in the day of the Lord.
1 Corinthians 5:11
11 But now I am writing to you not to associate with any so-called brother if he is a sexually immoral person, or greedy, or an idolater, or a reviler, or a drunkard, or a swindler—not even to eat with such a one.