Leviticus 13:58-59

The garment, whether the warp or the woof, or any article of leather from which the mark has departed when you washed it, it shall then be washed a second time and will be clean.” This 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.