On the seventh day the priest is to reexamine the infection, and if the scaly outbreak has not spread and there is no yellow hair in it, and it does not appear to be deeper than the skin,

Leviticus 13:30
the priest shall examine the infection, and if it appears to be deeper than the skin and the hair in it is yellow and thin, the priest must pronounce him unclean; it is a scaly outbreak, an infectious disease of the head or chin.

Leviticus 13:31
But if the priest examines the scaly infection and it does not appear to be deeper than the skin, and there is no black hair in it, the priest shall isolate the infected person for seven days.

Leviticus 13:33
then the person must shave himself except for the scaly area. Then the priest shall isolate him for another seven days.

And in the seventh day the priest shall look on the plague: and, behold, if the scale spread not, and there be in it no yellow hair, and the scale be not in sight deeper than the skin;