9 When you are encamped against your enemies, keep away from everything impure.
9 When the host goeth forth against thine enemies, then keep thee from every wicked thing.
9 "When you are encamped against your enemies, then you shall keep yourself from every evil thing.
9 When you are camped out, at war with your enemies, be careful to keep yourself from anything ritually defiling.
9 "When the army goes out against your enemies, then keep yourself from every wicked thing.
9 "When you go to war against your enemies, be sure to stay away from anything that is impure.
Matthew Henry's Commentary on Deuteronomy 23:9
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.