Leviticus 13:54-56

⁵⁴he will tell the person who owns it to wash it. Then he must put it in a separate place for another seven days.

⁵⁵Then the priest will examine it again. If the color of the mildew has not changed, even though it has not spread, that item must not be worn again. It does not matter if the mildew is on the inside of the clothing or on the outside; it must be burned.

⁵⁶But when the priest examines it after it has been washed, if the mildew has faded, he must tear out that part that had the mildew in it.