Commentary for Bava Batra 5:2
לישנא אחרינא אמרי לה סברוה מאי מחיצה פלוגתא דכתיב (במדבר לא, מג) ותהי מחצת העדה וכיון דרצו בונין את הכותל בעל כורחן אלמא היזק ראיה שמיה היזק
Another version [of the above discussion is as follows]. It was presumed [in the <i>Beth Hamidrash</i>] that mehizah means 'division', as in the verse, and the congregation's mehezath was etc. Since then the partners agree to make a division, they are compelled [according to the Mishnah] to build a wall. This would show that overlooking is a substantial damage. May I not say, however, that mehizah means a wall, as we have learnt: 'If the mehizah of a vineyard has been broken down, the owner [of an adjoining cornfield] can require the owner of the vineyard to restore it. If it is broken down again, he can again require him to restore it. If [the owner of the vineyard] neglects the matter and does not restore it, he causes his neighbour's produce to become forfeit, and is responsible for his loss.' [This being so],<span class="x" onmousemove="('comment',' That mehizah means wall. ');"><sup>2</sup></span>