Reference for Eruvin 150:8

ואם היו של יחידים וכו': אמר רב יוסף תני רבי היו ג' אסורין

were three they are forbidden.<span class="x" onmousemove="('comment',' The unrestricted use of the courtyards, unless they prepared an 'erub. For if two persons occupied the inner courtyard they impose restrictions upon each other and, as a 'forbidden foot' and on account of their right of way, on the occupiers of the other courtyard also; and if one person only occupied the inner courtyard he also imposes the same restrictions as a preventive measure against the possible relaxation of the law where two occupied it.');">²⁶</span> Said R'Bebai to them: 'Do not listen to him.<span class="x" onmousemove="('comment',' Sc. R. Joseph's statement that the ruling he cited had the authority of a Mishnah taught by Rabbi was incorrect.');">²⁷</span> It was I who first reported it,<span class="x" onmousemove="('comment',' The ruling cited by R. Joseph.');">²⁸</span> and I did so in the name of R'Adda B'Ahabah,<span class="x" onmousemove="('comment',' Not in the name of Rabbi or R. Judah I.');">²⁹</span> giving the following as a reason: Since I might describe them<span class="x" onmousemove="('comment',' The three occupiers all of whom have a right of way through the otter courtyard.');">³⁰</span>

Jastrow