Bava Batra 3A

דאיצטנע מינך.

so that I can hide from you at that time and avoid coming under your gaze.

לישנא אחרינא אמרי לה: סברוה, מאי ״מחיצה״⁠ – פלוגתא, דכתיב: ״ותהי מחצת העדה״; וכיון דרצו ⁠– בונין את הכותל בעל כורחן, אלמא היזק ראיה שמיה היזק.

§ The Talmud has so far presented one version of the discussion of the Mishnah. A different version relates the discussion as follows: The rabbis initially assumed: What is the meaning of the term meḥitza mentioned in the Mishnah? A division, not a partition, as it is written: “And the division of [meḥetzat] the congregation was” (Numbers 31:43). According to this interpretation, the Mishnah means to say: Since they wished to divide the jointly owned courtyard, they build a proper wall in the center even against the will of one of the partners. Apparently, it may be concluded that damage caused by sight is called damage.

אימא: מאי ״מחיצה״⁠ – גודא; דתנן: מחיצת הכרם שנפרצה ⁠– אומר לו: ״גדור״. נפרצה ⁠– אומר לו: ״גדור״. נתיאש הימנה ולא גדרה ⁠– הרי זה קידש, וחייב באחריותה.

The Talmud objects to this conclusion: But why not say: What is the meaning of the term meḥitza mentioned in the Mishnah? It means a partition. This usage would be as we learned in a baraita: Consider the case where a partition of [meḥitzat] a vineyard which separates the vineyard from a field of grain was breached, resulting, if the situation is not rectified, in the grain and grapes becoming items from which deriving benefit is prohibited. The owner of the field of grain may say to the owner of the vineyard: Build a partition between the vineyard and the field of grain. If the owner of the vineyard did so, and the partition was breached again, the owner of the field of grain may say to him again: Build a partition. If the owner of the vineyard neglected to make the necessary repairs and did not properly build a partition between the fields, the grain and grapes are rendered forbidden due to the prohibition of diverse kinds planted in a vineyard, and he is liable for the monetary loss.