Reference for Nedarim 97:7
אמר אביי האי תנא כל מידי דמתאכל ביה ריפתא תבשיל קרו ליה והתניא הנודר מן התבשיל אסור בכל מיני תבשיל ואסור בצלי ובשלוק ובמבושל ואסור בהיטריות רכות שהחולין אוכלין בהן פיתן
And it was taught [likewise], He who vows [abstinence] from a tabshil is forbidden all cooked food [tabshil], and whatsoever is roasted, seethed, or boiled; he is also forbidden soft preserves of gourds with which the sick eat their bread. But this is not so. For R. Jeremiah fell sick. When the doctor called to heal him, he saw a pumpkin lying in the house. Thereupon he left the house, saying. 'The angel of death is in that house,<span class="x" onmousemove="('comment',' I.e., the pumpkin is like poison for him. ');"><sup>13</sup></span> yet I am to cure him'!<span class="x" onmousemove="('comment',' This shows that they are injurious to invalids. ');"><sup>14</sup></span>