Deuteronomy 23:11-13

New Catholic Bible

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.

¹³ Designate a place outside of the camp where you can go to relieve yourself.