Reference for Eruvin 102:8
א"ר יהודה מעשה באנשי בית ממל ובאנשי בית גוריון בארומא שהיו מחלקין גרוגרות וצימוקין לעניים בשני בצורת ובאין עניי כפר שיחין ועניי כפר חנניה ומחשיכין על התחום למחרת משכימין ובאין
A rich man should, therefore,<span class="x" onmousemove="('comment',' If this is not inconvenient to him.');"><sup>26</sup></span> proceed beyond the Sabbath limit and make the declaration, 'Let my Sabbath base be where I stand now and this is the essence of an 'erub;<span class="x" onmousemove="('comment',' This shows, again in agreement with R. Nahman, that, according to R. Judah, a rich man is not ab initio permitted to prepare an 'erub without bread unless he is present at the spot he appointed.');"><sup>27</sup></span> the Sages, however, allowed a householder to send his 'erub by the hand of his servant or by the hand of his son or by the hand of any other agent in order to make it easier for him. R'Judah related: It once happened that the Memel and Gorion families at Aroma<span class="x" onmousemove="('comment',' [Or, Ruma, identified with Chirbet Rume south of the El-Batuff valley. West of Ruma, at about four thousand cubits distance lies Asochis');"><sup>28</sup></span>