Reference

Leviticus 13:58

And the garment, either warp, or woof, or whatsoever thing of skin it be, which thou shalt wash, if the plague be departed from them, then it shall be washed the second time, and shall be clean.
56

And if the priest look, and, behold, the plague be somewhat dark after the washing of it; then he shall rend it out of the garment, or out of the skin, or out of the warp, or out of the woof:

57

And if it appear still in the garment, either in the warp, or in the woof, or in any thing of skin; it is a spreading plague: thou shalt burn that wherein the plague is with fire.

58

And the garment, either warp, or woof, or whatsoever thing of skin it be, which thou shalt wash, if the plague be departed from them, then it shall be washed the second time, and shall be clean.

59

This is the law of the plague of leprosy in a garment of woollen or linen, either in the warp, or woof, or any thing of skins, to pronounce it clean, or to pronounce it unclean.

Counter-Arguments

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

Pre-Law Clean/Unclean Distinction

This verse is found within the book of Leviticus, which details the Mosaic Law given at Sinai, and therefore describes a clean/unclean distinction *within* the Mosaic Law, not before it. The verse itself does not contain any temporal indicators suggesting the practice predates the law being established in Leviticus.

Symbolic / Spiritual Interpretation

The verse is part of a detailed set of instructions for diagnosing and treating physical skin diseases and mildew/mold on garments and houses. The "plague" refers to a literal physical affliction, and the washing and cleaning are literal actions to remove contamination. There is no indication within the immediate context or the broader chapter that "clean" or "unclean" are being used symbolically for spiritual purity or moral holiness. The focus is entirely on ritual and physical purity as it re