Deuteronomy 23:10

If there is among you any man who is unclean because of a nocturnal emission, then he must go outside the camp; he may not reenter the camp.

Leviticus 15:16

Now if a man has a seminal emission, he shall bathe all his body in water and be unclean until evening.

Numbers 5:2-3

“Command the sons of Israel that they send away from the camp every leper and everyone having a discharge and everyone who is unclean because of a dead person.

1 Corinthians 5:11-13

But actually, I wrote to you not to associate with any so-called brother if he is an immoral person, or covetous, or an idolater, or a reviler, or a drunkard, or a swindler—not even to eat with such a one.

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
Now if a man has a seminal emission, he shall bathe all his body in water and be unclean until evening.
Numbers 5:2
“Command the sons of Israel that they send away from the camp every leper and everyone having a discharge and everyone who is unclean because of a dead person.
1 Corinthians 5:11
But actually, I wrote to you not to associate with any so-called brother if he is an immoral person, or covetous, or an idolater, or a reviler, or a drunkard, or a swindler—not even to eat with such a one.