Reference for Eruvin 187:20
הכי קאמרי ליה רבנן לרבי אליעזר מי לא קא מודית לן היכא דטילטל מתוכה לרשות הרבים ומרשות הרבים לתוכה דפטור מפני שהיא כרמלית צידי נמי לא שנא
Why then did they not express their difference of opinion in respect of the sides of public roads generally? - If they had expressed their difference of view in respect of the sides of public roads generally it might have been assumed that the Rabbis; differed from R'Eliezer only<span class="x" onmousemove="('comment',' Lit., 'when do the Rabbis differ . . these words'.');"><sup>32</sup></span> where there were border-stones<span class="x" onmousemove="('comment',' Or 'stakes' that formed a division between the public domain proper and the wall. This space being frequented by fewer people can only be regarded, as a karmelith.');"><sup>33</sup></span>