Reference for Shabbat 217:7

ת"ר רוחצים במי גרר במי חמתן במי עסיא ובמי טבריא אבל לא בים הגדול ולא במי משרה ולא בימה של סדום

Mar 'Ukba also said: If one knocks his hand or foot, he may reduce the swelling with wine, and need have no fear. The scholars asked: What about vinegar? Said R. Hillel to R. Ashi, When I attended R. Kahana's academy they said, Not vinegar.<span class="x" onmousemove="('comment',' Its purpose is too obviously medicinal. ');">¹⁷</span> Raba observed: But the people of Mahoza,<span class="x" onmousemove="('comment',' V. p. 150, n. 11. ');">¹⁸</span> since they are delicate, even wine heals them.<span class="x" onmousemove="('comment',' Their skin is so delicate that even wine acts like vinegar upon it. Hence they would only use it medicinally, and therefore it is forbidden. ');">¹⁹</span>

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