Reference

Deuteronomy 23:11

But it shall be, when evening cometh on, he shall wash himself with water: and when the sun is down, he shall come into the camp again.
9

When the host goeth forth against thine enemies, then keep thee from every wicked thing.

10

If there be among you any man, that is not clean by reason of uncleanness that chanceth him by night, then shall he go abroad out of the camp, he shall not come within the camp:

11

But it shall be, when evening cometh on, he shall wash himself with water: and when the sun is down, he shall come into the camp again.

12

Thou shalt have a place also without the camp, whither thou shalt go forth abroad:

13

And thou shalt have a paddle upon thy weapon; and it shall be, when thou wilt ease thyself abroad, thou shalt dig therewith, and shalt turn back and cover that which cometh from thee:

Counter-Arguments

The strongest case that this verse does not belong in this theme.

Symbolic / Spiritual Interpretation

The verse describes a literal physical act of washing and re-entry into a physical camp, with no explicit or implicit language suggesting a symbolic meaning for spiritual purity or moral holiness. The instruction is purely practical and ritualistic in its immediate context.