Reference for Bava Batra 35:14

תא שמע מרחיקין את המשרה מן הירק ואת הכרישין מן הבצלין ואת החרדל מן הדבורים טעמא דאיכא ירק הא ליכא ירק סמיך לא כי ליכא ירק נמי לא סמיך והא קמ"ל דהני קשו אהדדי

This is further indicated by the fact that the passage goes on: 'If there is a fence between,<span class="x" onmousemove="('comment',' Which makes it impossible for the one working in his vineyard to trespass on the field of the other. According to another reading (which seems preferable), we should translate: 'Come and hear: If there is a fence&nbsp;… on his side.' — Here too we assume that there is hard rock between. ');">¹⁰</span>

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