10 If there is among you any man who is not clean by reason of that which happens him by night, then shall he go outside of the camp. He shall not come within the camp:

Matthew Henry's Commentary on Deuteronomy 23:10

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.