Reference for Chullin 211:19

ורבי יוחנן אמר

moreover, to take some away in a vessel, there is no dispute at all that it is forbidden.<span class="x" onmousemove="('comment',' I.e., to fill a vessel with water from these springs and to pour it over the hands would not be deemed a valid 'washing' of the hands. For washing the hands by means of a vessel was primarily confined to the use of cold water, and although the Rabbis permitted water that had been heated, the permission did not extend to include the water from hot springs, for, being ever hot, it never came within the scope of the institution.');">¹²</span>

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