Reference for Eruvin 105:1
וגשרים ונפשות שיש בהן בית דירה מוציאין את המדה כנגדן ועושין אותה כמין טבלא מרובעת כדי שיהא נשכר את הזויות:
OR BRIDGES, OR SEPULCHRAL MONUMENTS THAT CONTAINED DWELLING CHAMBERS, THE BOUNDARY OF THE TOWN IS EXTENDED<span class="x" onmousemove="('comment',' Lit., 'the measure is brought out'.');"><sup>1</sup></span> TO INCLUDE THEM.<span class="x" onmousemove="('comment',' Lit., 'over against them', the houses, turrets etc. that projected. If a projection, for instance, was at one point, the boundary line is drawn along the outer side of that projection in a straight perpendicular line, to both extremities of that side of the town.');"><sup>2</sup></span> SABBATH LIMITS,<span class="x" onmousemove="('comment',' That are drawn at a distance of two thousand cubits from the said boundaries of the town.');"><sup>3</sup></span>