Reference for Bava Metzia 146:5
רבינא הוה יהיב זוזי לבני אקרא דשנוותא ושפכי ליה טפי כופיתא אתא לקמיה דרב אשי אמר ליה מי שרי אמר ליה אין אחולי הוא דקא מחלי גבך
usury. For they advance money for wine in Tishri, and receive choice quality in Tebeth!<span class="x" onmousemove="('comment',' Whereas had they taken it in Tishri, it might have turned sour by Tebeth. Thus in return for their advancing the money before the receipt of the goods the vendor takes the risk of deterioration, which is usury. Now, though it was stated, supra 72b, that one may buy wheat ahead if the buyer has stock when the money is paid, Raba of Barnesh thought that wine is different, because it is liable to turn sour. (Rashi). ');"><sup>9</sup></span> He replied: They too pay their money for wine, not vinegar, and from the very beginning, wine is wine, and vinegar, vinegar;<span class="x" onmousemove="('comment',' I.e., good wine remains good; if it turns now, it was poor from the very beginning, already containing the germs of deterioration, as it were, but its faultiness was not then discernible. ');"><sup>10</sup></span>