Reference for Bava Batra 202:3

והא נגעי כוכין להדדי

For if you would not say so,<span class="x" onmousemove="('comment',' That some of the chambers were dug deeper than the others. ');">⁵</span> how can four grottos be constructed according to R. Simeon? Surely [some of] the chambers [of adjacent grottos] would be touching<span class="x" onmousemove="('comment',' The chamber in the northwestern corner of the eastern grotto, for example. would coalesce with the south-eastern chamber of the northern grotto. V. fig. 2. ');">⁶</span>

Jastrow

Jastrow