"When you are encamped against your enemies, then you shall keep yourself from every evil thing. If any man among you becomes unclean [Hebrew lo yihyeh tahor, literally 'will not be clean'] because of a nocturnal emission [literally: 'by reason of what happens to him by night'], then he shall go outside the camp. He shall not come inside the camp, but when evening comes, he shall bathe himself in water, and as the sun sets, he may come inside the camp."