Leviticus 13:49-51

New International Version - UK

⁴⁹ if the affected area in the fabric, the leather, the woven or knitted material, or any leather article, is greenish or reddish, it is a defiling mould and must be shown to the priest. ⁵⁰ The priest is to examine the affected area and isolate the article for seven days. ⁵¹ On the seventh day he is to examine it, and if the mould has spread in the fabric, the woven or knitted material, or the leather, whatever its use, it is a persistent defiling mould; the article is unclean.