Leviticus 13:49-51

New Catholic Bible

⁴⁹ if there is a green or red spot on the garment or the skin, whether in the weave or the knit or on anything made of skin, it is to be considered a mark of leprosy and it is to be shown to the priest. ⁵⁰ The priest shall look at the spot, and shall secure that thing that is infected for seven days. ⁵¹ He shall examine the mark on the seventh day. If the spot on the garment has spread, whether it be in the weave or the knit, or on the skin or on anything that is made of skin, then the spot is an active leprosy. It is unclean.