אֵין הַמִּחְיָה סִימַן טֻמְאָה עַד שֶׁתִּהְיֶה כַּעֲדָשָׁה מְרֻבַּעַת אוֹ יֶתֶר עַל זֶה. וְכַמָּה שִׁעוּרָהּ כְּדֵי צְמִיחַת אַרְבַּע שְׂעָרוֹת שְׁתַּיִם אֹרֶךְ וּשְׁתַּיִם רֹחַב. וְהוּא שֶׁתִּהְיֶה הַמִּחְיָה בְּאֶמְצַע הַבַּהֶרֶת וְהַבַּהֶרֶת מַקֶּפֶת אוֹתָהּ מִכָּל צַד וְהִיא יְתֵרָה עַל הַמִּחְיָה רֹחַב שְׁתֵּי שְׂעָרוֹת אוֹ יֶתֶר. אֲבָל אִם הָיְתָה הַמִּחְיָה בְּצַד הַבַּהֶרֶת אֵינָהּ סִימַן טֻמְאָה. הָיְתָה מְפֻזֶּרֶת כְּגוֹן שֶׁהָיָה בָּשָׂר חַי כְּחַרְדָּל בְּמָקוֹם זֶה וּבָשָׂר חַי כְּחַרְדָּל בְּמָקוֹם אַחֵר אַף עַל פִּי שֶׁהַכּל בְּאֶמְצַע הַבַּהֶרֶת אֵינָן מִצְטָרְפִין לְכַעֲדָשָׁה. עַד שֶׁיִּהְיֶה בְּמָקוֹם אֶחָד בְּאֶמְצַע הַבַּהֶרֶת כַּעֲדָשָׁה מְרֻבָּע אוֹ יֶתֶר:
Flesh that heals is not considered as a sign of impurity unless it is the size of a lentil when a square is imposed upon it or more. How large is that? Enough for four hairs to grow, two lengthwise and two widthwise. The flesh that heals must be in the center of the baheret and the baheret must surround it on all sides with there being a margin of the size of two hairs or more between the healthy flesh and the edge of the baheret. If, however, the healthy flesh is at the side of the baheret, it is not a sign of impurity. If the healthy flesh was scattered in different places in the baheret, e.g., there was healthy flesh the size of a mustard seed in one place and healthy flesh the size of a mustard seed in another place, they are not combined to be considered as the size of a lentil even though they are both in the midst of the same baheret. Instead, there must be healthy flesh the size of a lentil when a square is imposed upon it or more in one place in the midst of the baheret.
