Leviticus 13:53-55

53And if the priest shall look, and, behold, the plague is not spread in the garment, either in the warp, or in the woof, or in any thing of skin; 54Then the priest shall command that they wash the thing in which the plague is, and he shall shut it up seven days more: 55And the priest shall look on the plague, after it is washed: and, behold, if the plague hath not changed its colour, and the plague hath not spread; it is unclean; thou shalt burn it in the fire; it eateth away inward, whether it is bare within or without.1