Leviticus 13:12 Halakhah

וְאִם־פָּר֨וֹחַ תִּפְרַ֤ח הַצָּרַ֙עַת֙ בָּע֔וֹר וְכִסְּתָ֣ה הַצָּרַ֗עַת אֵ֚ת כָּל־ע֣וֹר הַנֶּ֔גַע מֵרֹאשׁ֖וֹ וְעַד־רַגְלָ֑יו לְכָל־מַרְאֵ֖ה עֵינֵ֥י הַכֹּהֵֽן׃

And if the leprosy break out abroad in the skin, and the leprosy cover all the skin of him that hath the plague from his head even to his feet, as far as appeareth to the priest;