If the mildew disappears from the fabric, weave, or knit, or any leather article after washing, then it is to be washed again, and it will be clean.
58. And the garment. This kind of disease, God, in his infinite clemency, has willed to be unknown to us. He has indeed subjected woolen garments and furs to the ravages of the moth, and vessels of various kinds to rust, and other corruptions; in fact, has surrounded the human race with rottenness, in order that everywhere our eyes should light on the punishment of...
This is the law concerning the plague of leprosy in a garment, whether linen or woollen. A leprosy in a garment, with discernible indications of it, the colour changed by it, the garment fretted, the nap worn off, and this in some one particular part of the garment, and increasing when it was shut up, and not to be got out by washing is a...
Commenting on Leviticus 13:47-59
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. (s) So that he might be sure that the leprosy was departed, and that all opportunity for infection might be taken away.