Study Beitzah folio 16B with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
the fish fat, which one is permitted to eat even if cooked by non-Jews, is the essential element. Therefore, he teaches us that the flour is the essential element, and the non-Jew has created a new and significant dish, which is consequently prohibited.
R' Abba said: A joining of cooked foods requires an olive-bulk of food. A dilemma was raised before the rabbis: Is it enough to have one olive-bulk for all of the household members who are relying on this eiruv, or perhaps must there be a separate olive-bulk for each and every one in the household?
The Talmud comments: We learned in the Mishnah: If one ate the joining of cooked foods that he prepared, or if it was lost, he may not rely on it and cook with the initial intent to cook for Shabbat; but if he left any part of the eiruv, he may rely on it to cook for Shabbat. The Talmud asks: What
The Talmud attempts to bring another proof. Come and hear: The cooked dish that is required for a joining of cooked foods may be roasted, or even pickled, or well-boiled, or boiled in the regular manner, or may even be Spanish soft sea fish [koleyas ha’ispenin] upon which one poured hot water on t
Rav Huna said that Rav said: A joining of cooked foods requires knowledge, meaning that one must be aware of the eiruv for it to be effective. The Talmud comments: It is obvious that we require the knowledge of the one who prepares the eiruv; the question is: Do we also require the knowledge of the