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Text Excerpt
בשר שחוטה שמן, שצלאו עם בשר נבילה כחוש — אסור. מאי טעמא — מפטמי מהדדי.
Fatty kosher meat that one roasted in an oven together with lean non-kosher meat is forbidden, even if the two meats never came into contact with one another. What is the reason for this halakha? It is that they are flavored from one another. The fatty meat emits an aroma that is absorbed in the non-kosher meat. The aroma is then transferred back to the kosher meat, causing the kosher meat to absorb some aroma from the non-kosher meat.
ולוי אמר: אפילו בשר שחוטה כחוש, שצלאו עם בשר נבילה שמן — מותר. מאי טעמא — ריחא בעלמא הוא, וריחא לאו מילתא היא. עביד לוי עובדא בי ריש גלותא בגדי ודבר אחר.
And Levi said: That aroma does not cause meat to be forbidden. Even lean kosher meat that one roasted with fatty non-kosher meat is permitted. What is the reason for this halakha? Although the non-kosher meat emits an aroma that is absorbed into the kosher meat, it is merely an aroma, and an aroma is nothing significant. The Talmud relates that Levi took action, meaning that he put his opinion into practice, in the house of the Exilarch with a kid and something else, i.e., a pig, that had been roasted together. Levi did not prohibit the meat of the kid due to the aroma of the pig.
מיתיבי: אין צולין שני פסחים כאחד מפני התערובת. מאי לאו — תערובת טעמים, וקשיא ללוי! לא, מפני תערובת גופין.
The Talmud raises an objection: One may not roast two Paschal lambs together due to the mixing. What, is it not prohibited due to the mixing of flavors, i.e., due to the aromas that waft from one to the other, and it poses a difficulty to the opinion of Levi? The Talmud rejects this challenge: No, it is prohibited due to the mixing of carcasses. The groups who are roasting their Paschal offerings might accidentally switch offerings, in which case the offerings will be eaten by people who did not register for them.