Leviticus 13:53-55

53But if the priest sees that the area has not spread,

54he must order the area to be washed and put the clothing in a separate place for seven more days.

55The priest will examine the area again after it is washed. If it doesn’t look any different and the mildew has not spread, it is still unclean. It must be burned, whether the area is on the outside or the inside.