Avodah Zarah 66B

ריחיה חלא וטעמא חמרא ⁠— חלא, והוה ליה מין במינו, וכל מין במינו ⁠— במשהו.

because a liquid whose smell is vinegar and its flavor is wine is considered vinegar, and the wine, when it spilled into the jug of vinegar, took on the smell of vinegar from the moment it reached the airspace of the jug, and it has therefore become a type of food mixed with food of its own type. And any type of forbidden food mixed with food of its own type renders the mixture forbidden by any amount.

רבא אמר: בנותן טעם, ריחיה חלא וטעמא חמרא ⁠— חמרא, והוה ליה מין בשאינו מינו, וכל מין בשאינו מינו בנותן טעם.

Rava says that the mixture is forbidden only in a case where the wine imparts flavor to the vinegar, because a liquid whose smell is vinegar and its flavor is wine is considered wine, and it has therefore become a type of food mixed with food not of its own type. And any type of forbidden food mixed with food not of its own type renders the mixture forbidden only in a case where it imparts flavor to the mixture.

האי בת תיהא, גוי בדישראל ⁠— שפיר דמי, ישראל בדגוי ⁠— אביי אמר: אסור, רבא אמר: מותר. אביי אמר: אסור, ריחא מילתא היא. רבא אמר: מותר, ריחא לאו מילתא היא.

§ With regard to this bunghole [bat tiha], the hole in a jug through which one can smell the wine, if a non-Jew smells a Jew’s wine through it, the wine is permitted, but for a Jew to smell a non-Jew’s wine through it, Abaye says that it is prohibited, whereas Rava says that it is permitted. Abaye says that it is prohibited because he holds that a smell is a substantial matter, a significant form of pleasure, and it is not permitted to derive benefit from a non-Jew’s wine. Rava says it is permitted because he holds that a smell is nothing; it is insignificant.