Leviticus 13:19
And in the place where the boil was, a white swelling or reddish-white shiny spot appears, they must present themselves to the priest. A white swelling or reddish-white shiny spot in the location of the healed boil requires priestly examination. The two possible residual presentations after the boil — the white swelling and the reddish-white shiny spot — are different enough in character to potentially warrant different evaluations. The person who was previously healthy but developed the boil and now shows a residual mark is appropriately brought to the priest for evaluation of the new presentation.