Deuteronomy 23:10-12

New Catholic Bible

¹⁰ Camp Sanitation. When you are encamped against your enemies, stay away from everything that is impure. ¹¹ If one of your men among you is unclean because of a nocturnal emission, let him move outside of the camp. He is not to enter the camp. ¹² When evening arrives, he is to wash himself with water, and he can come back inside of the camp.