וְרָאָה֙ הַכֹּהֵ֔ן וְהִנֵּ֛ה פָּשְׂתָ֥ה הַמִּסְפַּ֖חַת בָּע֑וֹר וְטִמְּא֥וֹ הַכֹּהֵ֖ן צָרַ֥עַת הִֽוא׃ (פ)
And the priest shall look, and, behold, if the scab be spread in the skin, then the priest shall pronounce him unclean: it is leprosy.
Read halakhic rulings (Jewish law) on Leviticus 13:8: and classical halakhic sources.