Leviticus 13:3-5

New Revised Standard Version, Anglicised Catholic Edition

³ The priest shall examine the disease on the skin of his body, and if the hair in the diseased area has turned white and the disease appears to be deeper than the skin of his body, it is a leprous^[a] disease; after the priest has examined him he shall pronounce him ceremonially unclean. ⁴ But if the spot is white in the skin of his body, and appears no deeper than the skin, and the hair in it has not turned white, the priest shall confine the diseased person for seven days. ⁵ The priest shall examine him on the seventh day, and if he sees that the disease is checked and the disease has not spread in the skin, then the priest shall confine him for seven days more.