Leviticus [Pertaining to Levites] 13:4-5

⁴If the bright spot is white in the skin of his body, and its appearance is not deeper than the skin, and its hair has not turned white, then the priest shall isolate the infected person for seven days.

⁵The priest shall examine him on the seventh day, and, behold, if in his eyes the plague is arrested, and the plague has not spread in the skin, then the priest shall isolate him for seven more days. (LY:2)