21 But if, when the priest examines it, there is no white hair in it and it is not more than skin deep and has faded, then the priest is to isolate them for seven days.

Read Leviticus 13:21 Using Other Translations

But if the priest look on it, and, behold, there be no white hairs therein, and if it be not lower than the skin, but be somewhat dark; then the priest shall shut him up seven days:
But if the priest examines it and there is no white hair in it and it is not deeper than the skin, but has faded, then the priest shall shut him up seven days.
But if the priest finds no white hair on the affected area and the problem appears to be no more than skin-deep and has faded, the priest must quarantine the person for seven days.