Deuteronomy 23:10

If someone among you becomes unclean due to nocturnal emissions, he must leave the camp and stay outside.

Leviticus 15:16

"If a man has a seminal emission, he is to bathe his entire body with water and remain unclean until evening.

Numbers 5:2-3

"Command the Israelis to send outside the encampment every leper, everyone who has a discharge, and whoever is ritually defiled by contact with a corpse.

1 Corinthians 5:11-13

But now I am writing to you to stop associating with any so-called brother if he is sexually immoral, greedy, an idolater, a slanderer, a drunk, or a robber. You must even stop eating with someone like that.

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
"If a man has a seminal emission, he is to bathe his entire body with water and remain unclean until evening.
Numbers 5:2
"Command the Israelis to send outside the encampment every leper, everyone who has a discharge, and whoever is ritually defiled by contact with a corpse.
1 Corinthians 5:11
But now I am writing to you to stop associating with any so-called brother if he is sexually immoral, greedy, an idolater, a slanderer, a drunk, or a robber. You must even stop eating with someone like that.

International Standard Version Copyright © 1996-2008 by the ISV Foundation.