1 Corinthians 5:7-13

YLT(i) 7 cleanse out, therefore, the old leaven, that ye may be a new lump, according as ye are unleavened, for also our passover for us was sacrificed—Christ, 8 so that we may keep the feast, not with old leaven, nor with the leaven of evil and wickedness, but with unleavened food of sincerity and truth.
9 I did write to you in the epistle, not to keep company with whoremongers— 10 and not certainly with the whoremongers of this world, or with the covetous, or extortioners, or idolaters, seeing ye ought then to go forth out of the world— 11 and now, I did write to you not to keep company with him, if any one, being named a brother, may be a whoremonger, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner—with such a one not even to eat together; 12 for what have I also those without to judge? those within do ye not judge? 13 and those without God doth judge; and put ye away the evil from among yourselves.