Deuteronomy 23:14

14that from which you were relieved. For the Lord your God walks in the midst of your camp, in order to rescue you, and to deliver your enemies to you. And so, let your camp be holy, and let nothing filthy appear within it, lest he abandon you.
23:14 No uncleanness: This caution against suffering any filth in the camp, was to teach them to fly the filth of sin, which drives God away from the soul.(Challoner)

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