סימן עג סעיף ב
שֶׁיִּקְצֹץ לְאֵינוֹ יְהוּדִי שְׂכָרוֹ, שֶׁאָז הוּא עוֹשֶׂה אֶת הַמְּלָאכָה בִּשְׁבִיל עַצְמוֹ, שֶׁיְקַבֵּל שְׂכָרוֹ. וְלָכֵן מִי שֶׁיֵשׁ לוֹ מְשָׁרֵת אֵינוֹ יְהוּדִי לִזְמַן יָדוּעַ, אָסוּר לְהַנִּיחַ לוֹ לַעֲשׂוֹת מְלָאכָה בְּשַׁבָּת, מִפְּנֵי שֶׁהַמְּלָאכָה הִיא רַק לְתוֹעֶלֶת הַיִשְֹרָאֵל. וְאֵינוֹ יְהוּדִי הַנּוֹסֵעַ לְאֵיזֶה מָקוֹם וְיִשְֹרָאֵל נוֹתֵן לוֹ אִגֶּרֶת שֶׁיִּשָּׂאֶהָ שָׁמָּה. וְיִשָּׂאֶהָ גַּם בְּשַׁבָּת, צָרִיךְ הַיִשְֹרָאֵל לָתֵת לוֹ אֵיזֶה שָׂכָר, כְּדֵי שֶׁהָאֵינוֹ יְהוּדִי יַעֲשֶׂה בִּשְׁבִיל שְׂכָרוֹ וְלֹא בְּחִנָּם.
b) The wages of the non-Jew should be set in advance6It is sufficient to tell him that you will pay him properly. If there is a standard fee you need mention only that you will pay him without stipulating the amount. Even when it is accepted that everyone pays for such work, you still must mention to the non-Jew that you too will pay [Biur Halachah 252, based on Shulchan Aruch and Magein Avraham]. so that he will be doing the work for his own sake in order to get paid. Therefore, if you have a non-Jewish servant for a pre-determined period of time, it is forbidden to allow him to do any work for you on Shabbos,7This holds true even when he does not do the work in your house and even when you did not tell him to do it. Some say you must protest his doing it in your house even when he is doing it for himself (Taz). Eliyahu Rabbah permits it when he does it for himself. Chayei Adam permits it when he does something that is obviously for his own benefit. See Mishnah Berurah 244: 30, see Kitzur paragraph 8 and footnote 19. because then the work is done solely for the benefit of the Jew. If a non-Jew travels to a certain place and a Jew gives him a letter to carry there, which he will carry on Shabbos, the Jew must give him some compensation,8Chayei Adam (kelal 3: 11) permits mailing letters on Erev Shabbos. Also see Peri Megadim 247: 3. so that the non-Jew does it for his compensation and not gratis.
תנא דבי אליהו כל השונה הלכות בכל יום מובטח לו שהוא בן העולם הבא שנאמר הליכות עולם לו אל תקרי הליכות אלא הלכות (נדה ע"ג.)