Jerusalem Talmud Eruvin 5.6

משנה: מִי שֶׁהָיָה בַמַּזְרַח וְאָמַר לִבְנוֹ לְעָרֵב לוֹ בַמַּעֲרָב. בַּמַּעֲרָב וְאָמַר לִבְנוֹ לְעָרֵב לוֹ בַמִּזְרָח אִם יֵשׁ מִמֶּנּוּ וּלְבֵיתוֹ אַלְפַּיִם אַמָּה וּלְעֵירוּבוֹ יוֹתֵר מִיכָּן מוּתָּר לְבֵיתוֹ וְאָסוּר לְעֵירוּבוֹ. לְעֵירוּבוֹ אַלְפַּיִם אַמָּה וּלְבֵיתוֹ יוֹתֵר מִיכָּן מוּתָּר לְעֵירוּבוֹ וְאָסוּר לְבֵיתוֹ. הַנּוֹתֵן אֶת עֵירוּבוֹ בְּעִיבּוּרָהּ שֶׁל עִיר לֹא עָשָׂה כְלוּם. נְתָנוֹ חוּץ לַתְּחוּם מַה שֶׁנִּשְׂכַּר הוּא מַפְסִיד:

MISHNAH: If somebody was in the East and told his son to make him an eruv in the West, or in the West and told his son to make him an eruv in the East, if there are from his place to his house 2’000 cubits but to his eruv more than this, he is permitted up to his house but forbidden to his eruv; if to his eruv 2’000 cubits but to his house more than that, he is permitted up to his eruv but forbidden to his house. If somebody puts his eruv in the complement of the town he did not do anything. If he puts it outside the domain what he had gained he loses.

הלכה: פיס׳. מִי שֶׁהָיָה בַמִּזְרָח כול׳. מִן קוֹשֵׁיי מַקְשֵׁי לָהּ בַּר קַפָּרָא. לְמִזְרָח בְּנוֹ וּלְמַעֲרָב בְּנוֹ. נִיחָא אִם יֵשׁ מִמֶּנּוּ וּלְבֵיתוֹ אַלְפַּיִם אַמָּה וּלְעֵירוּבוֹ יוֹתֵר מִִיכֵּן. מוּתָּר לְבֵיתוֹ וְאָסוּר לְעֵירוּבוֹ. לְעֵירוּבוֹ אַלְפַּיִם אַמָּה וּלְבֵיתוֹ יוֹתֵר מִיכָּן. מוּתָּר לְעֵירוּבוֹ וּלְבֵיתוֹ אָסוּר.

HALAKHAH: Paragraph. “If somebody was in the East,” etc. Because of the difficulty did Bar Qappara ask, the East of his son and the West of his son? One understands “if there are from his place to his house 2’000 cubits but to his eruv more than this, he is permitted up to his house but forbidden to his eruv.” “If to his eruv be 2’000 cubits but to his house more than that, he is permitted up to his eruv but forbidden to his house”?