1 Corinthians 5:9-11

I wrote you in my letter not to associate with sexually immoral people; I did not at all mean with the sexually immoral people of this world, or with the greedy and swindlers, or with idolaters, for then you would have to go out of the world. 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.