Leviticus 13:56

But the priest may look at it and see that the mildew has faded after it was washed. Then he must cut that part out of the cloth, the leather, or the woven or knitted cloth.

Leviticus 13:56, Readable English Bible (READ)

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Previous · Leviticus 13:55After it has been washed, the priest must look at it again. The item with mildew may not look any different. Then it is unclean, even though the mildew has… Next · Leviticus 13:57But the mildew may come back in the cloth, the woven or knitted cloth, or any leather item. If so, it is spreading. You must burn the item that has mildew.