Mishnayos Beitzah Perek 5 Mishnah 6

With regard to one who had produce in a different city beyond the Shabbat limit, and the residents of that city where the produce was located joined the Shabbat boundaries, enabling them to reach the owner’s home on the Festival,and they wish to bring him some of his produce, they may not bring it to him. His produce is as his feet; since it is outside of his Shabbat limit, it may not be taken from its place. However, if the owner placed an eiruv to enable travel to that city, the legal status of his produce is like his status with regard to the Shabbat limit. People from that city who also placed an eiruv may bring the produce to him, since he himself may walk to the produce and take it.

מִי שֶׁהָיוּ פֵרוֹתָיו בְּעִיר אַחֶרֶת, וְעֵרְבוּ בְנֵי אוֹתָהּ הָעִיר לְהָבִיא אֶצְלוֹ מִפֵּרוֹתָיו, לֹא יָבִיאוּ לוֹ. וְאִם עֵרַב הוּא, פֵּרוֹתָיו כָּמוֹהוּ: