SECTION 395 The Laws [Governing] the Blessing [Recited When Establishing] an Eruv (1)

סימן שצה דִּינֵי בִּרְכַּת עֵרוּב וּבוֹ סְעִיף אֶחָד:

1 It is a mitzvah to endeavor to establish shitufim for lanes like [it is a mitzvah to establish] eruvin for courtyards.1

[Before establishing the shituf,] one should recite the blessing [praising G‑d, “Who… commanded us] concerning the mitzvah of eruv.” [The person reciting the blessing] should then say, “Via this shituf, it shall be permissible for all the residents of this lane to take out and bring in from the courtyards to the lane [and from the lane to the courtyards].”

If the shituf is being established with bread2 and [the residents of the courtyards] are relying on the shituf in the place of an eruv, without making an eruv in the courtyards at all, as stated in sec. 387[:1], one should also say, “[and to take out and bring in] from the courtyards to the houses [and from the houses to the courtyards].”3

When should the blessing be recited? When one collects [the food for the shituf] from the residents of the lane or when he grants them a share [in the food being used for the shituf], as explained in sec. 366[:18].

Failure to recite the blessing or make a declaration does not invalidate the shituf, as explained in that source.4

א מִצְוָה לְחַזֵּ(ו)ר אַחַר שִׁתּוּפֵי מְבוֹאוֹת א כְּמוֹ אַחַר עֵרוּבֵי חֲצֵרוֹת.ב,1

וּמְבָרֵךְ עָלָיו "עַל מִצְוַת עֵרוּב", וְאוֹמֵר "בְּזֶה הַשִּׁתּוּף יְהֵא מֻתָּר לְכָל בְּנֵי הַמָּבוֹי לְהוֹצִיא וּלְהַכְנִיס מֵחֲצֵרוֹת לְמָבוֹי". ג

וְאִם מִשְׁתַּתְּפִים בְּפַת2 וְסוֹמְכִין עַל שִׁתּוּף בִּמְקוֹם עֵרוּב, וְאֵין מְעָרְבִין בַּחֲצֵרוֹת כְּלָל, ד כְּמוֹ שֶׁנִּתְבָּאֵר בְּסִמָּן שפ"ז ה – יֹאמַר גַּם כֵּן "מֵחֲצֵרוֹת לְבָתִּים".ו,3

אֵימָתַי מְבָרֵךְ עָלָיו? בְּשָׁעָה שֶׁמְּקַבֵּץ אוֹתוֹ ז מִבְּנֵי הַמָּבוֹי אוֹ בְּשָׁעָה שֶׁמְּזַכֶּה לָהֶם,ח כְּמוֹ שֶׁנִּתְבָּאֵר בְּסִמָּן שס"ו. ט

וְאִם לֹא בֵרַךְ י וְלֹא אָמַר עָלָיו כְּלוּםיא – אֵינוֹ מְעַכֵּב, כְּמוֹ שֶׁנִּתְבָּאֵר שָׁם:4