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The Shulchan Aruch · Orach Chayim

אורח חיים תנ״וOrach Chayim 456

Siman 456 of 697 in Orach Chayim — 3 se'ifim

הלכות פסחLaws of Passover· siman 456

Se’if 1א׳

אֵין לָשִׁין לְפֶסַח עִסָה גְּדוֹלָה מִשִּׁעוּר חַלָּה, שֶׁהִיא מ "ג בֵּיצִים וְחֹמֶשׁ בֵּיצָה בֵּינוֹנִים וְהוּא עִשָּׂרוֹן, וְכֵן יְשַׁעֵר אוֹתָהּ, יְמַלֵּא כְּלִי מַיִם וִיעָרֶה הַמַּיִם מִמֶּנּוּ לִכְלִי אַחֵר, וְאַחַר כָּךְ יִתֵּן בּוֹ מ "ג בֵּיצִים וְיַחֲזִיר בּוֹ הַמַּיִם שֶׁעֵרָה מִמֶּנּוּ וְהַמַּיִם שֶׁיִּוָּתְרוּ, יִתְּנֵם בִּכְלִי אַחֵר, וְהַכְּלִי הַמַּחֲזִיק אוֹתָם הוּא הַמִּדָּה לְמַלְּאוֹתוֹ מִקֶּמַח. וְהַמִּדָּה מְחוּקָה וְלֹא גְּדוּשָׁה, וְשִׁעוּרָהּ מִקֶּמַח חִטָּה מִצְרִית תק "כ דִּרְהְם מִצְרִיִים בְּקֵרוּב. הַגָּה: וְלֹא יִדְחַק הַקֶּמַח בַּמִּדָּה, דְּאִם כֵּן לֹא יָלוּשׁ יָפֶה. וְטוֹב לוֹמַר בִּשְׁעַת נְתִינַת הַקֶּמַח לַמִּדָּה, שֶׁעוֹשֶׂה לְשֵׁם מִצְוָה (מַהֲרִי"ל).

The maximum amount of dough which can be kneeded for Matzvah One should not knead a large dough on Pesach to the extent that it requires Challah tithes. This is 43 1/5 average eggs or an 'Isaron'. To measure this, one should fill a vessel with water and pour the water from it into another vessel and afterwards he should place in 43 eggs and return the water to it and what remains [of the water] should be placed in another vessel and that if the vessel holds it, it can now be relied upon [for making the maximum amount of dough for a Matzah] as the measurement [of the vessel] when filled [is the maximum proportion] of flour. The metric should be filled level and not piled and translates to approximately 520 'draham' of Egyptian wheat flour.Rema: and one shouldn't pressure the flour metric because if one does, one may not knead well and ideally one should say 'Leshame Mitzvah'[for the purpose of the Mitzvah] when placing the flour into the metric (Mahril)

Se’if 2ב׳

אִם לָשׁ יוֹתֵר מִשִּׁעוּר זֶה, מֻתָּר בְּדִיעֲבַד.

If more than the proportion was kneaded, it is subsequently permissible.

Se’if 3ג׳

אַף עַל פִּי שֶׁאֵין מוֹדְדִין קֶמַח בְּיוֹם טוֹב לָלוּשׁ, בְּיוֹם טוֹב שֶׁל פֶּסַח שֶׁאֵין לָשִׁין עִסָה גְּדוֹלָה מֵעִשָּׂרוֹן, מֻתָּר לִמְדֹּד; וְיֵשׁ אוֹסְרִים, אֶלָּא יִקַּח בְּאֹמֶד הַדַּעַת, וְלֹא יַרְבֶּה עַל עִשָּׂרוֹן וְהָכֵי נָהוּג.

Even though one may not measure flour on Yom Tov, for kneading on Yom Tov of Pesach, one may not knead dough larger than an 'Isaron' [and therefore] it is permitted to measure. There are those who forbid this and say that one should estimate with their judgment and not [take] more than an 'Isaron' (and this is the practice).

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Shulchan Aruch, Orach Chayim — Torat Emet 363 edition, via Sefaria — public domain

English: Sefaria Community Translation — CC0