Leviticus 13:50-51

New International Version

⁵⁰ The priest is to examine the affected area^(A) and isolate the article for seven days. ⁵¹ On the seventh day he is to examine it,^(B) and if the mold has spread in the fabric, the woven or knitted material, or the leather, whatever its use, it is a persistent defiling mold; the article is unclean.^(C)