Jerusalem Talmud Eruvin 4.10

משנה: מִי שֶׁיָצָא חוּץ לַתְּחוּם אֲפִילּוּ אַמָּה אַחַת לֹא יִכָּנֵס. רִבִּי שִׁמְעוֹן אוֹמֵר רַבִּי אֶלְעָזָר אוֹמֵר שְׁתַּיִם יִכָּנֵס שָׁלשׁ לֹא יִכָּנֵס. מִי שֶׁהֶחְשִׁיךְ חוּץ לַתְּחוּם אֲפִילּוּ אַמָּה אַחַת לֹא יִכָּנֵס. רִבִּי שִׁמְעוֹן אוֹמֵר אֲפִילּוּ חֲמֵשׁ עֶשְׂרֵה אַמָּה יִכָּנֵס שֶׁאֵין הַמָּשׁוֹחוֹת מְמַצִּין אֶת הַמִּידּוֹת מִפְּנֵי הַטּוֹעִים:

MISHNAH: If somebody left the Sabbath domain for even one cubit he may not reenter. Rebbi Simeon says, Rebbi Eleazar says, for two he may re-enter, three he may not re-enter. If somebody was outside the Sabbath domain at nightfall for even one cubit he may not enter. Rebbi Simeon says, even fifteen cubits he may enter since the rope-spanners do not exhaust the measure because of errors.

הלכה: פיס׳. מִי שֶׁיָצָא חוּץ לַתְּחוּם כול׳. רִבִּי אָחָא בְשֵׁם רִבִּי חִינְנָא וְרַב חַסְדַּיי תְּרֵיהוֹן אָמְרִין. לֹא מַר אֶלָּא שְׁתַּיִם. הָא שְׁתַּיִם וְכָל שֶׁהוּא יִכָּנֵס. דְּהוּא דְּרִבִּי לָעְזָר. דְּרִבִּי לָעְזָר אָמַר. שְׁתַּיִם יִכָּנֵס. שָׁלֹשׁ לֹא יִכָּנֵס. אָמַר לוֹ רִבִּי יוֹסֵה. אָמְרִין דְּבַתְרָהּ. שָׁלוֹשׁ לֹא יִכָּנֵס. הָא שָׁלֹשׁ פָּחוּת כָּל שֶׁהוּא יִכָּנֵס. הֲווֹן בָּעֵיי מֵימַר. מַה דָמַר רִבִּי לָעְזָר בְּיוֹצֵא. הָא בְמַחְשִׁיךְ לֹא. אַשְׁכַּח תַּנֵּי. הִיא אָדָא הִיא אָדָא. הֲווֹן בָּעֵיי מֵימַר. מַה דָמַר רִבִּי שִׁמָעוֹן בְּמַחְשִׁיךְ. הָא בְיוֹצֵא לֹא. אַשְׁכַּח תַּנֵּי. הִיא אָדָא הִיא אָדָא.

HALAKHAH: Paragraph. “If somebody left the Sabbath domain,” etc. Rebbi Aḥa in the name of Rebbi Ḥinena and Rav Ḥasdai both are saying, he said only “two”. Therefore could he enter with two and a little bit? Since this is Rebbi Eleazar’s, as Rebbi Eleazar said, “for two he may re-enter, three he may not re-enter.” Rebbi Yose told him, one says at the end, “three he may not re-enter,” therefore three minus a little bit he may re-enter. They wanted to say, what Rebbi Eleazar said is about one who left, therefore not about one who stayed overnight. It was found stated, one is like the other. They wanted to say, what Rebbi Simeon said is about one who stayed overnight, therefore not about one who left. It was found stated, one is like the other.