13 With your utensils you shall have a trowel; when you relieve yourself outside, you shall dig a hole with it and then cover up your excrement.

Matthew Henry's Commentary on Deuteronomy 23:13

Commentary on Deuteronomy 23:9-14

(Read Deuteronomy 23:9-14)

The camp of the Lord must have nothing offensive in it. If there must be this care taken to preserve the body clean, much more should we be careful to keep the mind pure.