Leviticus 13:57-59

57yet if it appears again in the garment, whether in the warp or in the woof, or in any article of leather, it is an outbreak; the article with the mark shall be burned in the fire. 58But the garment, whether the warp or the woof, or any article of leather from which the mark has disappeared when you washed it, shall then be washed a second time and will be clean.”

59This is the law for the mark of leprosy in a garment of wool or linen, whether in the warp or in the woof, or in any article of leather, for pronouncing it clean or unclean.