For the LORD your God walks in the midst of your camp, to deliver you and give your enemies over to you; therefore your camp shall be holy, that He may see no unclean thing among you, and turn away from you.
Deuteronomy 23:14
Surrounding context
23:13 and you shall have an implement among your equipment, and when you sit down outside, you shall dig with it and turn and cover your refuse.
23:14 For the LORD your God walks in the midst of your camp, to deliver you and give your enemies over to you; therefore your camp shall be holy, that He may see no unclean thing among you, and turn away from you.
23:15 "You shall not give back to his master the slave who has escaped from his master to you.