Jerusalem Talmud Shabbat 23:3

משנה: לֹא יִשְׂכּוֹר אָדָם פּוֹעֲלִים בַּשַּׁבָּת וְלֹא יֹאמַר אָדָם לַחֲבֵירוֹ לִשְׂכּוֹר לוֹ פוֹעֲלִים וְאֵין מַחְשִׁיכִין עַל הַתְּחוּם לִשְׂכּוֹר פּוֹעֲלִים וּלְהָבִיא פֵירוֹת. אֲבָל מַחְשִׁיךְ הוּא לִשְׁמוֹר וּמֵבִיא פֵירוֹת בְּיָדוֹ. כְּלָל אָמַר אַבָּא שָׁאוּל כָּל־שֶׁאֲנִי זַכַּאי בַּאֲמִירָתוֹ רַשַּׁאי אֲנִי לְהַחְשִׁיךְ עָלָיו׃ MISHNAH: A person may not hire workers on the Sabbath⁸To work for him after the Sabbath. Doing so would violate a prophetic injunction, Is. 58:13. and not say to another to hire workers for him. One does not wait for nightfall at the Sabbath boundary⁹To move outside immediately on the first occasion. This is a rabbinic prohibition. to hire workers and to bring produce, but one may wait for nightfall to watch¹⁰To watch over his fields outside the Sabbath boundary since it is permitted to watch over one’s property inside the Sabbath boundary on the Sabbath proper. and to bring produce in his hand¹¹If he waited at the border for a legitimate cause he can bring some produce with him when returning.. Abba Shaul formulated a principle: For anything which I am permitted to talk about I am permitted to wait for nightfall¹²Anything one may ask another Jew to do for him on the Sabbath he is permitted to wait for at the Sabbath border at the end of the Sabbath..