Mishnah Negaim 8:8: If it spread of his entire [body] at once, from [a state of] purity, he becomes impure. From [a state of] impurity, he becomes pure. [A person with a Nega] who is pure from being quarantined is exempt from growing out [his hair], or from ripping [his clothing], or from shaving, or from [bringing] birds [as sacrifices]. [If he became pure] from [a state of] being decided [as impure], he is obligated in all of them. Both of these make [their partners] impure through sexual relations.

אִם בְּכֻלּוֹ פָרְחָה כְאַחַת, מִתּוֹךְ הַטָּהֳרָה, טָמֵא. וּמִתּוֹךְ הַטֻּמְאָה, טָהוֹר. הַטָּהוֹר מִתּוֹךְ הֶסְגֵּר, פָּטוּר מִן הַפְּרִיעָה וּמִן הַפְּרִימָה וּמִן הַתִּגְלַחַת וּמִן הַצִּפֳּרִים. מִתּוֹךְ הֶחְלֵט, חַיָּב בְּכֻלָּן. זֶה וָזֶה מְטַמְּאִים בְּבִיאָה:

Mishnah Negaim 8:9: Someone who comes in [to the priest initially] completely white [with a Nega, except for] a healthy patch of skin upon him [the size of] a lentil, [if afterwards it] spread over his entire [body] and then the tips of his limbs returned [from being covered], Rabbi Yishmael says: [The law is the same as] the tips of the limbs returning [from being covered] in the case of a great Baheret. Rabbi Elazar ben Azaria says: [The law is the same as] the tips of the limbs returning [from being covered] in the case of a small Baheret.

הַבָּא כֻלּוֹ לָבָן וּבוֹ מִחְיָה כָעֲדָשָׁה, פָּרְחָה בְכֻלּוֹ וְאַחַר כָּךְ חָזְרוּ בוֹ רָאשֵׁי אֵבָרִים, רַבִּי יִשְׁמָעֵאל אוֹמֵר, כַּחֲזִירַת רָאשֵׁי אֵבָרִים בְּבַהֶרֶת גְּדוֹלָה. רַבִּי אֶלְעָזָר בֶּן עֲזַרְיָה אוֹמֵר, כַּחֲזִירַת רָאשֵׁי אֵבָרִים בְּבַהֶרֶת קְטַנָּה: