Mishnà su Levitico 13:5
וְרָאָ֣הוּ הַכֹּהֵן֮ בַּיּ֣וֹם הַשְּׁבִיעִי֒ וְהִנֵּ֤ה הַנֶּ֙גַע֙ עָמַ֣ד בְּעֵינָ֔יו לֹֽא־פָשָׂ֥ה הַנֶּ֖גַע בָּע֑וֹר וְהִסְגִּיר֧וֹ הַכֹּהֵ֛ן שִׁבְעַ֥ת יָמִ֖ים שֵׁנִֽית׃
E il sacerdote lo guarderà il settimo giorno; e, ecco, se la peste rimane nel suo aspetto e la peste non si diffonde nella pelle, allora il sacerdote lo zittirà ancora sette giorni.
Mishnah Negaim
A bright spot in which there were no signs of uncleanness: At the beginning, or at the end of the first week, he is isolated; At the end of the second week or after it had been pronounced clean, he is pronounced clean. If while the priest was about to isolate him or to pronounce him clean, signs of uncleanness appeared in it, he certifies him as unclean. A bright spot in which there are signs of uncleanness, he certifies him as unclean. If while the priest was about to certify it as unclean the signs of uncleanness disappeared: If at the beginning, or at the end of the first week, he isolates him; But if at the end of the second week or after the spot had been pronounced clean, he is pronounced clean.
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