Reference for Negaim 3:7

הַבְּגָדִים מִטַּמְּאִים בִּשְׁנֵי שָׁבוּעוֹת וּבִשְׁלשָׁה סִימָנִין, בִּירַקְרַק וּבַאֲדַמְדַּם וּבְפִשְׂיוֹן. בִּירַקְרַק וּבַאֲדַמְדַּם, בַּתְּחִלָּה, בְּסוֹף שָׁבוּעַ רִאשׁוֹן, וּבְסוֹף שָׁבוּעַ שֵׁנִי, לְאַחַר הַפְּטוּר. וּבְפִשְׂיוֹן, בְּסוֹף שָׁבוּעַ רִאשׁוֹן, בְּסוֹף שָׁבוּעַ שֵׁנִי, לְאַחַר הַפְּטוּר. וּמִטַּמְּאִין בִּשְׁנֵי שָׁבוּעוֹת, שֶׁהֵן שְׁלֹשָׁה עָשָׂר יוֹם:

Clothing [that have <i>Negaim</i>] are made impure after two weeks or through three signs: deep green, deep red, or expansion. Regarding deep green and deep red, [they are made impure] initially, at the end of the first week, at the end of the second week, [or] after the exemption. Regarding expansion, at the end of the first week, at the end of the second week, [or] after the exemption. And they are made impure after two weeks, which are [actually] thirteen days.

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