Leviticus 13:55

And the priest shall examine the diseased thing after it has been washed. And if the appearance of the diseased area has not changed, though the disease has not spread, it is unclean. You shall burn it in the fire, whether the rot is on the back or on the front.

After it has been washed, the priest is to reexamine the contamination. If the appearance of the contaminated article has not changed, it is unclean. Even though the contamination has not spread, you must burn the fabric. It is a fungus on the front or back of the fabric.

Then the priest must examine the object again. If he finds that the contaminated area has not changed color after being washed, even if it did not spread, the object is defiled. It must be completely burned up, whether the contaminated spot is on the inside or outside.

And the priest shall examine it after the infection has been washed off, and if the infection has not changed its outward appearance and the infection has not spread, it is unclean; he must burn it in the fire; it is a fungus on its back or on its front.

And the priest shall look on the plague, after that it is washed: and, behold, if the plague have not changed his colour, and the plague be not spread; it is unclean; thou shalt burn it in the fire; it is fret inward, whether it be bare within or without.