Reference for Zevachim 236:16

כי עבריה לירדן בר כמה הוי בר שבעין ותמני וקאמר בן חמש ושמונים שנה הרי שבע שכבשו

- They were indeed contiguous, even as R'Hama son of R'Hanina said:<span class="x" onmousemove="('comment',' In reference to the Temple at Jerusalem.');">¹⁷</span> A strip issued from Judah's portion and entered Benjamin's portion, and on this the altar was built.

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