1 Corinthians 5:10

Yet not (h) altogether with the fornicators of this world, or with the covetous, or extortioners, or with idolaters; for then must ye needs go out of the world.

(h) If you should utterly abstain from such men's company, you should go out of the world. Therefore I speak of those who are in the very bosom of the Church, who must be brought back into order by discipline, and not of those who are outside of the Church, with whom we must labour by all means possible, to bring them to Christ.