Reference for Bava Kamma 65:1

אחר לית ליה אימתא דרביה האי אית ליה אימתא דרביה

— A stranger need not fear the master-smith<span class="x" onmousemove="('comment',' Who should thus have borne in mind that the stranger might not yet have left the place. The smith should therefore not yet have allowed the the sparks to fly off. ');">¹</span>

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