Reference for Bava Batra 165:3

וכרב יוסף מי לא תנן ר"מ ור"ש אומרים הנוטע את כרמו שמונה אמות על שמונה מותר להביא זרע לשם

we learnt:<span class="x" onmousemove="('comment',' Kil. IV, 9. ');">⁵</span> R. Meir and R. Simeon say: He who plants his vineyard [leaving distances of] eight cubits [between the rows] may insert seed there!<span class="x" onmousemove="('comment',' Between the rows, though the intervening spaces are only eight cubits in width. Why. then, did Abaye tell R. Joseph that he must not dispute the report of R. Nahman? ');">⁶</span>

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