Deuteronomy 23:11-13

Amplified Bible

¹¹ But when evening comes, he shall bathe in water, and at sundown he may return to the camp.

¹² “You shall also have a place outside the camp to which you may go, ¹³ and you shall have a spade among your tools, and when you [prepare to] sit down outside [to relieve yourself], you shall dig a hole with it and shall turn and cover up your waste.