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. 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.
Leviticus 13:58 belongs to the laws regulating uncleanness and leprosy, dealing with the cleansing of garments and other affected materials. Warp, woof, and things of skin identify cloth from which garments are made, and the law prescribes examining the plague or mildew in cloth with washing and reexamination. If the plague has departed after washing, the article is washed a second time and declared clean.
This washing is physical cleansing, a visible removal of uncleanness that prepared the object for the sanctuary's deeper cleansing with blood and was not itself that cleansing. Where the infection was too deep to be removed by washing, the garment was required to be burned. The leprosy laws required proper precautions even though God was Israel's healer.
Leprosy is a fitting type and prefigure of sin as a moral disease. Like leprosy, sin is incurable by human means and does not heal itself, is infectious and spreads its pollution to others through influence, with its chief seat within and its effects reaching outward. The comparison between leprosy and sin stands without further detail of the garment-cleansing procedure. Cited among Israel's cleansing instructions, the verse is part of a broader call to be clean, showing cleansing was completed and the object declared clean when the plague had departed and the garment or skin item had been washed again. As an infected garment could spread disease, worldly fashions are to be rejected and clothing that spreads pride and vanity avoided.