Leviticus 13:57-59

57And if it appear still in the garment, or in the warp, or in the woof, or in anything of skin, it is a [leprosy] breaking out: thou shalt burn with fire that wherein the sore is. 58But the garment, or the warp, or the woof, or whatever thing of skin which thou hast washed, and the sore departeth from them, it shall be washed a second time, and it is clean. 59This is the law of the sore of leprosy in a garment of wool or linen, or in the warp, or in the woof, or in anything of skin, to cleanse it, or to pronounce it unclean.