Deuteronomy 23:10

If there be with thee a man that is not clean from what hath happened in the night, then shall he go outside the camp; he shall not come inside the camp;

Leviticus 15:16

And if any man's seed of copulation pass from him, then he shall bathe his whole flesh in water, and be unclean until the even.

Numbers 5:2-3

Command the children of Israel, that they put out of the camp every leper, and every one that hath an issue, and whosoever is defiled by a dead person:

1 Corinthians 5:11-13

But now I have written to you, if any one called brother be fornicator, or avaricious, or idolater, or abusive, or a drunkard, or rapacious, not to mix with him; with such a one not even to eat.

Treasury of Scripture Knowledge

Summary

If there be among you any man, that is not clean by reason of uncleanness that chanceth him by night, then shall he go abroad out of the camp, he shall not come within the camp:

Bible References

General references

Leviticus 15:16
And if any man's seed of copulation pass from him, then he shall bathe his whole flesh in water, and be unclean until the even.
Numbers 5:2
Command the children of Israel, that they put out of the camp every leper, and every one that hath an issue, and whosoever is defiled by a dead person:
1 Corinthians 5:11
But now I have written to you, if any one called brother be fornicator, or avaricious, or idolater, or abusive, or a drunkard, or rapacious, not to mix with him; with such a one not even to eat.