Deuteronomy 23:13-15

13and 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.

14For 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.

15“You shall not give back to his master the slave who has escaped from his master to you.