Avodah Zarah 30A

איחלופי ⁠— כיון דאיכא חותם אחד, לא טרח ומזייף.

the concern that a non-Jew may secretly exchange his wine with the wine of a Jew, since there is one seal, the non-Jew will not exert himself and forge a different seal in order to facilitate the exchange.

תנו רבנן: יין מבושל ואלונתית של גוים ⁠— אסורין, אלונתית כברייתה ⁠— מותרת. ואיזו היא אלונתית? כדתנן גבי שבת: עושין אנומלין ואין עושין אלונתית. ואיזו היא אנומלין ואיזו היא אלונתית? אנומלין ⁠— יין ודבש ופלפלין, אלונתית ⁠— יין ישן ומים צלולין ואפרסמון, דעבדי לבי מסותא.

§ The Talmud discusses the halakha with regard to various types of wine. A baraita states: Cooked wine and aluntit of non-Jews are prohibited; but already prepared aluntit that was made by a Jew before it entered the non-Jew’s possession is permitted. The Talmud asks: And what is aluntit? It is as we learned in a baraita with regard to Shabbat: One may prepare anomlin, but one may not prepare aluntit. The baraita clarifies: And what is anomlin and what is aluntit? Anomlin is a drink that is a mixture of wine, honey, and pepper. Aluntit is a mixture of aged wine and clear water and balsam, which they prepare for drinking after bathing in a bathhouse to cool down from the heat of the bathhouse. It is prohibited to prepare aluntit on Shabbat because it is a type of remedy.

רבה ורב יוסף דאמרי תרוייהו: יין מזוג אין בו משום גילוי, יין מבושל אין בו משום ניסוך. איבעיא להו: יין מבושל יש בו משום גילוי או אין בו משום גילוי? תא שמע: העיד רבי יעקב בר אידי על יין מבושל שאין בו משום גילוי.

Rabba and Rav Yosef both say: Diluted wine is not subject to the halakha of exposure, according to which the consumption of a liquid is prohibited if it is left uncovered; and cooked wine is not subject to the halakha of libation, which prohibits deriving benefit from wine that has been in a non-Jew’s possession. A dilemma was raised before them: With regard to cooked wine, is it subject to the halakha of exposure, or is it not subject to the halakha of exposure? The Talmud resolves the dilemma: Come and hear: R' Ya’akov bar Idi testified about cooked wine and stated that it is not subject to the halakha of exposure.