Leviticus 13:6

⁴But if the spot be clear and white in the skin of his flesh, yet the appearance of it be not deep below the skin, and its hair have not changed itself for white hair, but it is dark, then the priest shall separate him that has the spot seven days;

⁵and the priest shall look on the spot the seventh day; and, behold, if the spot remains before him, if the spot has not spread in the skin, then the priest shall separate him the second time seven days.

— Leviticus 13:6 —

⁷But if the bright spot should have changed and spread in the skin, after the priest has seen him for the purpose of purifying him, then shall he appear the second time to the priest,

⁸and the priest shall look upon him; and, behold, if the mark have spread in the skin, then the priest shall pronounce him unclean: it is a leprosy.