Deuteronomy 23:9-11

New Revised Standard Version Catholic Edition

Sanitary, Ritual, and Humanitarian Precepts

⁹ When you are encamped against your enemies you shall guard against any impropriety.

¹⁰ If one of you becomes unclean because of a nocturnal emission, then he shall go outside the camp; he must not come within the camp. ¹¹ When evening comes, he shall wash himself with water, and when the sun has set, he may come back into the camp.