Leviticus 13:53-55

53“When the priest examines it, if the contamination has not spread in the fabric, the warp or weft, or any leather article,

54the priest is to order whatever is contaminated to be washed and quarantined for another seven days.

55After 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.