Reference for Nedarim 82:8

<big><strong>מתני׳</strong></big> לא יאכל עמו מן האבוס שלפני הפועלים ולא יעשה עמו באומן דברי רבי מאיר וחכ"א עושה והוא ברחוק ממנו:

OR EAT AT THE SAME TABLE WITH HIM<span class="x" onmousemove="('comment',' This is not forbidden lest he eat of the other's portion. ');">¹²</span> BUT NOT OUT OF THE SAME DISH;<span class="x" onmousemove="('comment',' A large bowl was sometimes placed on the table, from which all ate. The maddir and the muddar may not eat out of the same bowl, lest the former take too little from it and thereby benefit the latter. ');">¹³</span>

Jastrow