Reference for Eruvin 93:10

תרתי למה לי והא אמרת ר"מ ורבי יהודה הלכה כרבי יהודה

a poor man only.<span class="x" onmousemove="('comment',' Sc. a person who cannot afford, or is unable to obtain (as for instance on a desert journey) the required quantity of food. A 'rich man' however, i.e., one who can afford or obtain it must provide his 'erub with food only.');">²⁵</span> R'Judah said: [It<span class="x" onmousemove="('comment',' That an 'erub may be made with one's feet and that no food is in that case necessary.');">²³</span> applies] to both rich and poor, the Rabbis' enactment that an 'erub is to be prepared with bread having had the only purpose of making it easier for the rich man so that<span class="x" onmousemove="('comment',' By being enabled to send an 'erub of food through an agent.');">²⁶</span>

Jastrow