On the seventh day the priest is to reexamine him, and if he sees that the infection is unchanged and has not spread on the skin, the priest must isolate him for another seven days.
Jewish Publication Society of America Version (JPS1917) - Leviticus 13:5 >And the priest shall look on him the seventh day; and, behold, if the plague stay in its appearance, and the plague be not spread in the skin, then the priest shall shut him up seven days more.