אורח חיים ש״וOrach Chayim 306

Se’if 1א׳

מִמְּצֹא חֶפְצְךָ (יְשַׁעְיָה נח, יג): חֲפָצֶיךָ אֲסוּרִים; אֲפִלּוּ בְּדָבָר שֶׁאֵינוֹ עוֹשֶׂה שׁוּם מְלָאכָה, כְּגוֹן: שֶׁמְּעַיֵּן נְכָסָיו לִרְאוֹת מַה צָּרִיךְ לְמָחָר, אוֹ לֵילֵךְ לְפֶתַח הַמְּדִינָה כְּדֵי שֶׁיְּמַהֵר לָצֵאת בַּלַּיְלָה לַמֶּרְחָץ; וְכֵן אֵין מַחְשִׁיכִים עַל הַתְּחוּם לִשְׂכֹּר פּוֹעֲלִים. אֲבָל מַחְשִׁיךְ עַל הַתְּחוּם לְהָבִיא בְּהֶמְתּוֹ. וְיֵשׁ אוֹמְרִים שֶׁאִם אֵין הַבְּהֵמָה יְכוֹלָה לֵילֵךְ בָּרַגְלַיִם, כְּגוֹן שֶׁהוּא טָלֶה קָטָן, אֵינוֹ רַשַּׁאי לְהַחְשִׁיךְ דְּאֵינוֹ רַשַּׁאי לְהָבִיא דְּאָסוּר לְטַלְטֵל בַּעֲלֵי חַיִּים שֶׁהֵם מֻקְצִים. הַגָּה: וְהוּא הַדִּין דְּאָסוּר לְטַיֵּל לִמְצֹא סוּס אוֹ סְפִינָה אוֹ קָרוֹן לָצֵאת (מָרְדְּכַי סוֹף פֶּרֶק מִי שֶׁהֶחְשִׁיךְ).

1. Which things are permitted to say on Shabbat. And following, 14 subsections It is forbidden to pursue your concerns (i.e. tend to mundane matters), even in a matter that does not involve any work, for example, someone enters to see what is necessary for the next day, or one goes to the edge of his town so he can quickly leave to go to the bathhouse as soon as it becomes night, and also when he needs to go beyond the techum in order to hire workers. One may, however, wait until nightfall at the end of his Shabbos limits so that on Saturday night, he can bring back his animal that [wandered] outside the Shabbos limits. And there are those that say if an animal cannot walk using its legs, for example if it is a small lamb [that must be carried on one’s shoulders], it is not permitted to go close to the techum because it is not permitted to bring something that is forbidden to carry [on Shabbos] if it is muktzeh. RAMA: This is the same law that applies to someone who goes out to find a horse or a ship or wagon to depart with. (Mordechai end of Perek 'Mi She'hashchich')

Se’if 2ב׳

הָיְתָה בְּהֶמְתּוֹ עוֹמֶדֶת חוּץ לַתְּחוּם, יָכוֹל לִקְרוֹת לָהּ כְּדֵי שֶׁתָּבֹא.

2. If one's animal stood outside the Shabbat limits, one is able to call to it so that it re-enters.

Se’if 3ג׳

מַחְשִׁיכִין עַל הַתְּחוּם לַעֲשׂוֹת צָרְכֵי כַּלָּה; אוֹ צָרְכֵי מֵת לְהָבִיא לוֹ אָרוֹן וְתַכְרִיכִין; וְיָכוֹל לוֹמַר לַחֲבֵרוֹ שֶׁיַּחְשִׁיךְ כְּדֵי שֶׁיָּבִיא לוֹ, וְיָכוֹל לוֹמַר לוֹ: לֵךְ לְמָקוֹם פְּלוֹנִי לְמָחָר וְאִם לֹא מָצָאתָ בְּמָקוֹם פְּלוֹנִי לֵךְ לְמָקוֹם פְּלוֹנִי, לֹא מָצָאתָ בְּמָנָה קַח בְּמָאתַיִם; וּבִלְבַד שֶׁלֹּא יַזְכִּיר לוֹ סְכוּם מִקָּח, כְּלוֹמַר: שֶׁלֹּא יֹאמַר לוֹ סָךְ יָדוּעַ שֶׁלֹּא לְהוֹסִיף עָלָיו; וְכֵן אִם לָקַח מִמֶּנּוּ בִּשְׁמוֹנָה, לֹא יֹאמַר תֵּן לִי עוֹד בִּשְׁנַיִם וְאֶהְיֶה חַיָּב לְךָ עֲשָׂרָה. הַגָּה: וְאִם אִי אֶפְשָׁר לוֹ אֶלָּא אִם כֵּן יִזְכֹּר לוֹ סְכוּם מִקָּח, מֻתָּר בְּכָל עִנְיָן דְּהָא צָרְכֵי מִצְוָה הוּא (הגמ"ר פ"ה). וְיֵשׁ אוֹסְרִים בְּכָל עִנְיָן, וְכֵן עִקָּר (בֵּית יוֹסֵף בְּשֵׁם הָרַ"ן וְהַמַּגִּיד וּמָרְדְּכַי פ' כִּירָה וְהג"מ פ"א ופכ"ו).

3. We allow it to get dark on the Shabbat limits for the needs of a bride or a corpse, to bring it a coffin and shrouds. And it's possible to say to one's fellow that it is darkening, in order that they will bring to one and one will be able to say "Go to this place tomorrow - if you do not find in this place, go to that - if you do not find such a good at such a price, buy at higher than the price" - as long as one does not mention the sum of the purchase. That is to say, one should not say to them a known sum that they should not add to, and so too if they buy eight one should not say to them "Get me two more and I will owe you for ten". Note: and if it is not possible to do this without mentioning the sum, it's permitted in every matter which is for the needs of a mitzvah (Hagahot Mordechai Chapter 5). And there are those who prohibit in every case, and so is the ikar [?] (Beit Yosef in the name of the Ra"n and the Maggid and the Mordechai, chapter "Kira" [the stove?], and the Gaha"m [?] chapter 1, and the Pacha"v [?])