Reference for Bava Kamma 61:2

בשלמא רב אדא בר אהבה כשמעתיה אלא רב הונא לימא הדר ביה

<b><i>MISHNAH</i></b>. IF TWO POTTERS WERE FOLLOWING ONE ANOTHER AND THE FIRST STUMBLED AND FELL DOWN AND THE SECOND STUMBLED BECAUSE OF THE FIRST, THE FIRST IS LIABLE FOR THE DAMAGE DONE TO THE SECOND.

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