Leviticus 14:3

and the priest shall go out of the camp , and the priest shall look . Then, if the case of leprous disease is healed in the leprous person ,

The priest is to go outside the camp and examine them. If they have been healed of their defiling skin disease,

And the priest shall go forth out of the camp; and the priest shall look, and, behold, if the plague of leprosy be healed in the leper;