1 Corinthians 5:10-11

10I was not including the sexually immoral of this world, or the greedy and swindlers, or idolaters. In that case you would have to leave this world. 11But now I am writing you not to associate with anyone who claims to be a brother but is sexually immoral or greedy, an idolater or a verbal abuser, a drunkard or a swindler. With such a man do not even eat.