Deuteronomy 23:9-14

Amplified Bible

⁹ “When you go out as an army [to fight] against your enemies, you shall keep yourselves from every evil [thing].

¹⁰ “If there is any man among you who is [ceremonially] unclean because of nocturnal emission, then he must go outside the camp; he shall not come back to the camp. 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. ¹⁴ Since the Lord your God walks in the midst of your camp to rescue you and to defeat your enemies before you, therefore your camp must be holy (undefiled); and He must not see anything indecent among you or He will turn away from you.