Leviticus 13:54-56

⁵⁴then the priest shall command that they wash the thing wherein the sore is, and he shall shut it up seven days a second time.

⁵⁵And the priest shall look on the sore after the washing, and behold, if the sore have not changed its appearance, and the sore have not spread, it is unclean: thou shalt burn it with fire: it is a fretting sore on what is threadbare or where the nap is gone.

⁵⁶But if the priest look, and behold, the sore hath become pale after the washing of it, then he shall rend it from the garment, or from the skin, or from the warp, or from the woof.