Reference for Eruvin 175:1

אנשי טבריא כמי שלא יבטל ממלאכתו דמי

the men of Tiberias<span class="x" onmousemove="('comment',' Who were mainly workers.');">¹</span> are in the same category as the man whose object was that he might not be disturbed from his usual work. And what was the point in his permitting them to 'dry themselves with a towel'? - That, as it was taught.

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