Eruvin 29A

ההוא, בבשיל ולא בשיל.

The Talmud answers: That is referring to a beet that was only partially cooked, which is dangerous.

איכא דאמרי, אמר רב המנונא: אין מערבין בתרדין חיין, דאמר רב חסדא: סילקא חייא קטיל גברא חייא. והא קא חזינן דקא אכלי ולא מייתי? התם בבשיל ולא בשיל.

There are some who say that Rav Hamnuna said: One may not establish an eiruv with raw beets, as Rav Ḥisda said: Raw beet kills a healthy person. The Talmud asks: Don’t we see people eating it and they do not die? The Talmud answers: There, it is referring to a beet that was only partially cooked, which is dangerous.

אמר רב חסדא: תבשיל של תרדין יפה ללב וטוב לעינים, וכל שכן לבני מעיים. אמר אביי: והוא דיתיב אבי תפי ועביד תוך תוך.

Rav Ḥisda said: A cooked dish of beets is beneficial for the heart, good for the eyes, and all the more so beneficial for the intestines. Abaye said: That is specifically when the dish sits on the stove and makes a tukh tukh sound, i.e., it is cooked thoroughly enough to produce a boiling sound.

אמר רבא: הריני כבן עזאי בשוקי טבריא. אמר ליה ההוא מרבנן לרבא: תפוחים בכמה? אמר ליה: וכי מערבין בתפוחים?

Rava once said when he was in an especially good mood: Behold, I am like the intellectually sharp ben Azzai, who would regularly expound in the markets of Tiberias. I, too, am ready to answer any question posed to me. One of the rabbis said to Rava: How many apples are needed to establish an eiruv? Rava said to him: Does one establish an eiruv with apples?

ולא? והתנן: כל האוכלין מצטרפין לפסול את הגוויה בחצי פרס, ובמזון שתי סעודות לעירוב, וכביצה לטמא טומאת אוכלים!

The other Sage responded: And is it not permissible to establish an eiruv with them? Didn’t we learn in a Mishnah: All foods combine to disqualify the body of a priest who eats half of a half-loaf of ritually impure food, and to complete the measure of food required for two meals for the purpose of an eiruv, and to complete the measure of an egg-bulk required for a food to be able to contract the ritual impurity of foods? An apple is a kind of food, so it should be included in the items that may be used to establish an eiruv.