Deuteronomy 23:12

Holy Bible: Easy-to-Read Version

“You also must have a place outside the camp where people can go to relieve themselves.

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Then, when evening comes, the man must bathe himself in water. And when the sun goes down, he may come into the camp again.

Among your weapons, you must also carry a stick to dig with. Then, when you relieve yourself, you must dig a hole and cover it up.

“If a man has a flow of semen, he must bathe his whole body in water. He will be unclean until evening.