Deuteronomy 23:10

If any man among you becomes unclean through anything which has taken place in the night, he is to go out from the tent-circle and keep outside it:

Leviticus 15:16

And if a man's seed goes out from him, then all his body will have to be bathed in water and he will be unclean till evening.

Numbers 5:2-3

Give orders to the children of Israel to put outside the tent-circle every leper, and anyone who has any sort of flow from his body, and anyone who is unclean from the touch of the dead;

1 Corinthians 5:11-13

But the sense of my letter was that if a brother had the name of being one who went after the desires of the flesh, or had the desire for other people's property, or was in the way of using violent language, or being the worse for drink, or took by force what was not his, you might not keep company with such a one, or take food with him.

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 a man's seed goes out from him, then all his body will have to be bathed in water and he will be unclean till evening.
Numbers 5:2
Give orders to the children of Israel to put outside the tent-circle every leper, and anyone who has any sort of flow from his body, and anyone who is unclean from the touch of the dead;
1 Corinthians 5:11
But the sense of my letter was that if a brother had the name of being one who went after the desires of the flesh, or had the desire for other people's property, or was in the way of using violent language, or being the worse for drink, or took by force what was not his, you might not keep company with such a one, or take food with him.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain