Commentary for Eruvin 38:7

ורב פפא מאי קמ"ל תנינא

What [new principle], however, does R'Papa teach us? Did we not learn [what he said] in our Mishnah?<span class="x" onmousemove="('comment',' Sc. in accordance with the measurements laid down in the Baraitha just discussed, his statement follows naturally from the respective rulings of R. Meir and R. Judah in our MISHNAH: For as the former allows a space for six oxen, corresponding to a distance of (6 X 1 2/3 =) ten cubits, and the latter allows one for eight oxen, corresponding to a distance of (8 X 1 2/3 =) thirteen and a third cubits, it is obvious that R. Meir does not require single boards in the case of a cistern that is eight cubits wide where the gaps in the enclosure are not wider than ten cubits and that R. Judah does require such boards where a cistern is twelve cubits wide and the gaps in the enclosure are bigger than thirteen and a third cubits.');">¹⁵</span> R'Papa did not hear of the Baraitha<span class="x" onmousemove="('comment',' Just discussed, which lays down the measurements of the length and thickness of a cow.');">¹⁶</span>

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