Mishnah Negaim 11:5: That which stands [remains unchanged] after the first week should be washed and quarantined [again]. That which stands after the second week should be burnt. That which spreads in this or that [week] should be burnt. That which was initially faint, Rabbi Yishmael says it should be washed and quarantined but the Sages say he does not need to. That which was faint after the first week should be washed and quarantined. That which was faint after the second week should be torn out and what was torn should be burnt and it requires patching. Rabbi Nechemia says it does not require patching.

הָעוֹמֵד בָּרִאשׁוֹן, יְכַבֵּס וְיַסְגִּיר. הָעוֹמֵד בַּשֵּׁנִי, יִשָּׂרֵף. הַפּוֹשֶׂה בָזֶה וּבָזֶה, יִשָּׂרֵף. הִכְהָה בַתְּחִלָּה, רַבִּי יִשְׁמָעֵאל אוֹמֵר, יְכַבֵּס וְיַסְגִּיר. וַחֲכָמִים אוֹמְרִים, אֵינוֹ זָקוּק לוֹ. הִכְהָה בָרִאשׁוֹן, יְכַבֵּס וְיַסְגִּיר. הִכְהָה בַשֵּׁנִי, קוֹרְעוֹ וְשׂוֹרֵף מַה שֶּׁקָּרַע. וְצָרִיךְ מַטְלִית. רַבִּי נְחֶמְיָה אוֹמֵר, אֵינוֹ צָרִיךְ מַטְלִית:

Mishnah Negaim 11:6: If the Nega returned to the clothing, the patch is saved. If it returned to the patch, the [entire article of] clothing is burnt. If [a patch of] quarantined [clothing] was attached to pure [clothing] and the spot returned to the clothing, the patch should be burnt. If it returned to the patch, the first piece of clothing should be burnt and the patch should serve the second piece of clothing as an indicator.

חָזַר נֶגַע לַבֶּגֶד, מַצִּיל אֶת הַמַּטְלִית. חָזַר לַמַּטְלִית, שׂוֹרֵף אֶת הַבֶּגֶד. הַטּוֹלֶה מִן הַמֻּסְגָּר בַּטָּהוֹר, חָזַר נֶגַע לַבֶּגֶד, שׂוֹרֵף אֶת הַמַּטְלִית. חָזַר לַמַּטְלִית, הַבֶּגֶד הָרִאשׁוֹן יִשָּׂרֵף, וְהַמַּטְלִית תְּשַׁמֵּשׁ אֶת הַבֶּגֶד הַשֵּׁנִי בְּסִימָנִין: