Audio by Dovid Stern

Mishnah Oholot 13:5: The following reduce the size of a handbreadth. [A piece the size of] less than an olive of flesh reduces with a Rova [specific unit of volume] of bones, and a bone less than a barley grain reduces with [a piece the size of] an olive of flesh. [A piece the size of] less than an olive of a corpse or [a piece the size of] less than an olive of a carcass or [a piece the size of] less than a lentil of a vermin, or [a piece the size of] less than an egg of food, grain that is in a window, a spiderweb that has substance, the carcass of a bird which he did not decide [to eat], the carcass of an impure bird which he decided [to eat] but did not make susceptible to impurity or he made it susceptible but did not decide [to eat] it.

אֵלּוּ מְמַעֲטִין אֶת הַטֶּפַח. פָּחוֹת מִכַּזַּיִת בָּשָׂר מְמַעֵט עַל יְדֵי רֹבַע עֲצָמוֹת, וּפָחוֹת מֵעֶצֶם כַּשְּׂעֹרָה מְמַעֵט עַל יְדֵי כַזַּיִת בָּשָׂר. פָּחוֹת מִכַּזַּיִת מִן הַמֵּת, פָּחוֹת מִכַּזַּיִת מִן הַנְּבֵלָה, פָּחוֹת מִכָּעֲדָשָׁה מִן הַשֶּׁרֶץ, פָּחוֹת מִכַּבֵּיצָה אֳכָלִים, הַתְּבוּאָה שֶׁבַּחַלּוֹן, וְכָכַי שֶׁיֶּשׁ בָּהּ מַמָּשׁ, וְנִבְלַת הָעוֹף הַטָּהוֹר שֶׁלֹּא חִשַּׁב עָלֶיהָ, וְנִבְלַת עוֹף הַטָּמֵא שֶׁחִשַּׁב עָלֶיהָ וְלֹא הִכְשִׁירָהּ, אוֹ הִכְשִׁירָהּ וְלֹא חִשַּׁב עָלֶיהָ:

Mishnah Oholot 13:6: The following do not reduce: A bone does not reduce with other bones, nor does meat with other meat, nor [a piece the size of] an olive of a corpse or [a piece the size of] an olive of a carcass or [a piece the size of] a lentil of a vermin, nor [a piece the size of] an egg of food, nor grain that is in windows, nor a spiderweb that does not have substance, nor the carcass of a pure bird that he decided [to eat], nor a carcass of an impure bird that he decided [to eat] and made susceptible to impurity, nor the warp or weft that have [impure] spots, nor a brick from a Beit Pras [a field in which a grave has been plowed over], says Rabbi Meir. The Sages say the brick does reduce because its dust is pure. This is the rule, what is pure reduces and what is impure does not reduce.

אֵלּוּ שֶׁאֵינָן מְמַעֲטִים. אֵין הָעֶצֶם מְמַעֵט עַל יְדֵי עֲצָמוֹת, וְלֹא בָשָׂר עַל יְדֵי בָשָׂר, וְלֹא כַזַּיִת מִן הַמֵּת, וְלֹא כַזַּיִת מִן הַנְּבֵלָה, וְלֹא כָעֲדָשָׁה מִן הַשֶּׁרֶץ, וְלֹא כַבֵּיצָה אֳכָלִים, וְלֹא תְבוּאָה שֶׁבַּחַלּוֹנוֹת, וְלֹא כָכַי שֶׁאֵין בָּהּ מַמָּשׁ, וְלֹא נִבְלַת הָעוֹף הַטָּהוֹר שֶׁחִשַּׁב עָלֶיהָ, וְלֹא נִבְלַת עוֹף הַטָּמֵא שֶׁחִשַּׁב עָלֶיהָ וְהִכְשִׁירָהּ, וְלֹא הַשְּׁתִי וְהָעֵרֶב הַמְנֻגָּעִים, וְלֹא לְבֵנָה מִבֵּית הַפְּרָס, דִּבְרֵי רַבִּי מֵאִיר. וַחֲכָמִים אוֹמְרִים, הַלְּבֵנָה מְמַעֶטֶת, מִפְּנֵי שֶׁעֲפָרָהּ טָהוֹר. זֶה הַכְּלָל, הַטָּהוֹר מְמַעֵט, וְהַטָּמֵא אֵינוֹ מְמַעֵט:

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