Deuteronomy 23:10
When there is in thy midst a man who is not clean through a mischance of the night, then shall he go forth unto the outside of the camp, he shall not come into the midst of the camp;
Leviticus 15:16
And, when there goeth out from, any man, an outflow of seed, then shall he bathe all his flesh in water, and be unclean until the evening.
Numbers 5:2-3
Command the sons of Israel, that they send forth out of the camp, every leper, and every one that hath a flux, - and every one that is unclean by the dead:
1 Corinthians 5:11-13
But, now, I have written unto you not to be mixing yourselves up, - if anyone named a brother, be a fornicator, or covetous, or an idolater, or a reviler, or a drunkard, or an extortioner, with such a one as this, not so much, as to be eating together,