Reference for Bava Metzia 190:8

לא באותה מלאכה אלא מאי מקום אחר דקא מרפי ואזיל קמה

But if you suggest that both the first clause and the second refer to the same work, what is there remarkable? Both<span class="x" onmousemove="('comment',' Whether he breaks up the ground before it, or guards it from behind. ');">⁷</span>

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