ו אֵין מְעָרְבִין בִּפְרוּסָה, אֲפִלּוּ הִיא גְּדוֹלָה הַרְבֵּה, אֲבָל בִּשְׁלֵמָה, אֲפִלּוּ קְטַנָּה מְאֹד מְעָרְבִין, וּבִלְבַד שֶׁיְּהֵא בָּהֶם כָּל כָּךְ שֶׁיְּהֵא בָּהֶם כְּשִׁעוּר. וּמִיהוּ אִם נִטָּל מִמֶּנּוּ כְּדֵי חַלַּת נַחְתּוֹם, שֶׁהוּא אֶחָד ממ "ח, מְעָרְבִין בָּהּ אֲפִלּוּ לֹא הָיְתָה טְבוּלָה לְחַלָּה. וְאִם נִפְרְסָה וְחִבְּרָהּ בְּקֵיסָם, שֶׁהִכְנִיס הַקָּצֶה הָא' בְּתוֹךְ הַפַּת וְהַקָּצֶה הַשֵּׁנִי בְּתוֹךְ הַפְּרוּסָה, אִם אֵינוֹ נִכָּר שֶׁנִּפְרְסָה, מְעָרְבִין בָּהּ. הַגָּה: וְיֵשׁ שֶׁפֵּרְשׁוּ הָא דְּאֵין מְעָרְבִין רַק בְּפַת שָׁלֵם הַיְנוּ שֶׁכָּל הָעֵרוּב בְּיַחַד יִהְיֶה פַּת שָׁלֵם; וְלָכֵן נָהֲגוּ לְקַבֵּץ מִכָּל בַּיִת וּבַיִת מְעַט קֶמַח, וְעוֹשִׂין חַלָּה אַחַת שְׁלֵמָה וּמְעָרְבִין בָּהּ (הַמַּגִּיד וְהַגָּהוֹת הָרַאֲבָ"ד פֵּ"א מהל' עֵירוּבִין). וְכֵן הַמִּנְהָג פָּשׁוּט בְּכָל מְדִינוֹת אֵלּוּ. וְצָרִיךְ לִזָּהֵר שֶׁיְּהֵא בַּחַלָּה כְּשִּׁעוּר הַמְפֹרָשׁ לְקַמָּן סי' שס"ח (סָעִיף ג'). וְאַף עַל פִּי שֶׁנִּשְׁתַּיֵּר מִן הַקֶּמַח וְלֹא נַעֲשָׂה מִכֻּלּוֹ חַלָּה, אֲפִלּוּ הָכֵי הָוֵי עֵרוּב דְּלֹא גָּרַע מֵאֵלּוּ אֶחָד מְזַכֶּה לְכֻלָּם וְאַדַּעְתָּא דְּהָכֵי נָתְנוּ קִמְחָם מִתְּחִלָּה, כֵּן נִרְאֶה לִי.
6 We do not make an eruv with a slice, even if it’s very big. But with a full loaf, even if it’s very small, we make an eruv provided that it will contain the amount of a legal measure. However, if it is taken from it for the sake of a baker’s challah, which is 1/48th, we make an eruv with it, even if it wasn’t set aside for challah. And if it was cut and one fastened it with a toothpick, that he put one end inside the loaf and the second end inside the slice, if it is not recognizable that it was cut, we make an eruv with it. Rema: And there are those who interpreted this that we only make an eruv with a full loaf, that is that all of the eruv together will be [one] whole loaf. Therefore, it is the common practice to gather from every house a little bit of flour and make one full challah and make an eruv with it. And thus, the custom is widespread in all of these provinces. But, one needs to be careful that the challah contain a legal measure’s worth as explained earlier in 358. And even if there are left [homeowners] from [donating] the flour so that the challah is not made from everyone, even so, it is an eruv since one who grants [ownership] to all does not diminish from these people [so that they count]. And this was the intent of those who gave their flour from the outset. So it appears to me.