Mishnayos Kerisos Perek 1 Mishnah 6

A woman who gives birth to a daughter counts fourteen days during which she is ritually impure. That is followed by sixty-six days during which she remains ritually pure even if she experiences a flow of blood. The Torah obligates a woman to bring her offering on the eighty-first day (see Leviticus 12:1–6). If the woman miscarries another fetus before that day, she is not required to bring an additional offering. In the case of a woman who miscarries a fetus on the night of, i.e., preceding, the eighty-first day, Beit Shammai deem her exempt from bringing a second offering and Beit Hillel deem her liable to bring a second offering. Beit Hillel said to Beit Shammai: What is different between the night of the eighty-first and the day of the eighty-first? If they are equal with regard to the halakhot of ritual impurity, i.e., the blood flow of this woman on the eighty-first night renders her ritually impure and all the standard strictures of ritual impurity apply to her, will the two time periods not be equal with regard to liability to bring an additional offering as well? Beit Shammai said to Beit Hillel: No, there is a difference between that night and the following day. If you said with regard to a woman who miscarries on the eighty-first day that she is obligated to bring an additional offering, this is logical, as she emerged into a period that is fit for her to bring her offering. Would you say the same with regard to a woman who miscarries on the night of the eighty-first day, where she did not emerge into a period that is fit for her to bring her offering, as offerings are not sacrificed at night? Beit Hillel said to Beit Shammai: But let the case of a woman who miscarries on the eighty-first day that occurs on Shabbat prove that this distinction is incorrect, as she did not emerge into a period that is fit for her to bring her offering because individual offerings are not sacrificed on Shabbat, and nevertheless she is obligated to bring an additional offering. Beit Shammai said to Beit Hillel: No, there is a difference between these cases. If you said this ruling with regard to a woman who miscarries on the eighty-first day that occurs on Shabbat, the reason is that although Shabbat is unfit for the sacrifice of an individual offering, it is fit for the sacrifice of a communal offering whose time is fixed, e.g., the daily offering. Would you say the same with regard to a woman who miscarries on the night of the eighty-first day, as the night is completely unfit, since neither an individual offering nor a communal offering is sacrificed at night? Beit Shammai add: And as for the ritual impurity status of the blood, i.e., Beit Hillel’s opinion that the two time periods are equal with regard to the halakhot of ritual impurity, this does not prove what the halakha should be with regard to offerings, as with regard to a woman who miscarries before the completion of the term of eighty days, her blood is impure like the blood of a woman after childbirth, and nevertheless she is exempt from bringing the offering.

הַמַּפֶּלֶת אוֹר לִשְׁמוֹנִים וְאֶחָד, בֵּית שַׁמַּאי פּוֹטְרִין מִן הַקָּרְבָּן, בֵּית הִלֵּל מְחַיְּבִים. אָמְרוּ בֵית הִלֵּל לְבֵית שַׁמַּאי, מַאי שְׁנָא אוֹר לִשְׁמוֹנִים וְאֶחָד מִיּוֹם שְׁמוֹנִים וְאֶחָד. אִם שָׁוֶה לוֹ לַטֻּמְאָה, לֹא יִשְׁוֶה לוֹ לַקָּרְבָּן. אָמְרוּ לָהֶם בֵּית שַׁמַּאי, לֹא, אִם אֲמַרְתֶּם בְּמַפֶּלֶת יוֹם שְׁמוֹנִים וְאֶחָד, שֶׁכֵּן יָצְאָה בְשָׁעָה שֶׁהִיא רְאוּיָה לְהָבִיא בָהּ קָרְבָּן, תֹּאמְרוּ בְמַפֶּלֶת אוֹר לִשְׁמוֹנִים וְאֶחָד, שֶׁלֹּא יָצְאָה בְשָׁעָה שֶׁהִיא רְאוּיָה לְהָבִיא בָהּ קָרְבָּן. אָמְרוּ לָהֶן בֵּית הִלֵּל, וַהֲרֵי הַמַּפֶּלֶת יוֹם שְׁמוֹנִים וְאֶחָד שֶׁחָל לִהְיוֹת בְּשַׁבָּת תּוֹכִיחַ, שֶׁלֹּא יָצְאָה בְשָׁעָה שֶׁהִיא רְאוּיָה לְהָבִיא בָהּ קָרְבָּן וְחַיֶּבֶת בַּקָּרְבָּן. אָמְרוּ לָהֶם בֵּית שַׁמַּאי, לֹא, אִם אֲמַרְתֶּם בְּמַפֶּלֶת יוֹם שְׁמוֹנִים וְאֶחָד שֶׁחָל לִהְיוֹת בְּשַׁבָּת, שֶׁאַף עַל פִּי שֶׁאֵינוֹ רָאוּי לְקָרְבַּן יָחִיד, רָאוּי לְקָרְבַּן צִבּוּר, תֹּאמְרוּ בְמַפֶּלֶת אוֹר לִשְׁמוֹנִים וְאֶחָד, שֶׁאֵין הַלַּיְלָה רָאוּי לֹא לְקָרְבַּן יָחִיד וְלֹא לְקָרְבַּן צִבּוּר. הַדָּמִים אֵינָן מוֹכִיחִין, שֶׁהַמַּפֶּלֶת בְּתוֹךְ מְלֹאת, דָּמֶיהָ טְמֵאִין, וּפְטוּרָה מִן הַקָּרְבָּן: