1 Corinthians 5:11-13

but as it is, I wrote unto you not to keep company, if any man that is named a brother be a fornicator, or covetous, or an idolater, or a reviler, or a drunkard, or an extortioner; with such a one no, not to eat. For what have I to do with judging them that are without? Do not ye judge them that are within? But them that are without God judgeth. Put away the wicked man from among yourselves.