Deuteronomy 23:10-12

New Revised Standard Version, Anglicised Catholic Edition

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.

¹² You shall have a designated area outside the camp to which you shall go.