REVIEW QUESTIONS ON GEMARA AND RASHI
prepared by Rabbi Eliezer Chrysler
Kollel Iyun Hadaf, Jerusalem
Previous dafEruvin 38
ERUVIN 38 & 39 sponsored by a generous grant from an anonymous donor. Kollel Iyun Hadaf is indebted to him for his encouragement and support and prays that Hashem will repay him in kind.
(a) Rebbi Eliezer permits a person to place two Eruvin, one to the east
and one to the west, the one to be effective on Yom-Tov, the other, on the
Shabbos that follows it (or vice-versa).
What is his reason?
(b) What do the Rabbanan hold?
(c) Is there any difference between *this* case and one in which he places
only *one* Eruv and makes a condition to use *it* on one day, and to
retain his regular home as his residence on the other?
(a) What does Rebbi Eliezer mean when he asks the Rabbanan 'But you agree
with me that they have two different levels of sanctity'?
(b) The Rabbanan mentioned two cases in the Mishnah: that one may only
make an Eruv in *one direction*, and that one only make an Eruv for the
Are these not one and the same thing?
(c) How does Rebbi Eliezer deal with this Kashya?
(d) Rebbi Eliezer proved that Shabbos and Yom-Tov have two different
levels of sanctity very words of the Rabbanan (as we wrote in
Which other proof does he bring case of Me'arev be'Raglav?
(a) How do we reconcile the Rabbanan with Rebbi Eliezer's proofs?
(b) What does 've'Hacha Lechumra ve'Hacha Lechumra' mean?
(c) According to Rebbi Eliezer, why is one not permitted to place an Eruv
on Yom-Tov for Shabbos?
(a) Acording to Rebbi (the Tana Kama of the Beraisa), when Shabbos and
Yom-Tov follow each other, someone who made an Eruv by waiting on the spot
during the first Bein Hashemashos until Shabbos entered , must
nevertheless repeat this on the second day. What does he hold with regard
to someone whose Eruv was eaten on the first day? What is his reason for
Answers to questions
(b) Rebbi Yehudah holds 'Harei Zeh Chamar Gamal.
Why is this?
(c) Raban Shimon ben Gamliel and Rebbi Yishmael the son of Rebbi Yochanan
ben Berokah are quoted in the Beraisa as holding that the two days have
What do they really hold?
(a) Like which of the above Tana'im do we rule, and who is the initial
author of this opinion?
(b) When Rav issued his ruling, why did he not also quote Rebbi by name?
(c) So how did Rav know that Raban Shimon ben Gamliel and Rebbi Yishmael
the son of Rebbi Yishmael ben Berokah, like Rebbi, were not just quoting
Rebbi Eliezer, without actually agreeing with him?
(d) Two other Tana'im also follow the opinion of Rebbi Eliezer in this
regard. One of them may have been Rebbi Yossi b'Rebbi Yehudah S'timta'ah.
Why does the Gemara refer to him by that name?
(a) How did Rabah explain Rav, who ruled above like Rebbi Eliezer, yet he
also ruled that an egg laid on Shabbos is forbidden on Yom-Tov (or vice-
(b) Then how does he explain the Mishnah which requires the Eruv (which
was made on foot) to be re-placed on Yom-Tov (which is Erev Shabbos), if
he wishes to use it again for Shabbos. Why is this not also a case of
preparing on Yom-Tov for Shabbos?
(c) Then why is it that in the Mishnah that we quoted above (36a), when he
declares the jar of Ma'aser wine to be Terumas Ma'aser when Shabbos
enters, the wine is not valid for an Eruv for that same day?
(d) And why is it that if someone places two Eruvin for the two
consecutive days, one in the east and one in the west, Rebbi Eliezer
permits each Eruv on its respective day? Surely here too, the Eruv in the
west is not accessible to him on the first day (when he places it) - from
the east, from his new residence in the east?
(a) Why did the Gemara initially think that, since Rebbi Eliezer forbids
preparing one's Eruv on Yom-Tov for Shabbos and vice-versa, that it should
also then be forbidden to prepare his Eruv on foot (without using food) on
the first day for the second?
(b) Why in fact, does Rebbi Eliezer permit this?
(c) Why does the Gemara at first believe that Rebbi Eliezer holds like
Rebbi Yochanan ben Nuri (Cheftzei Hefker)? What does Rebbi Yochanan ben
(d) How then, do we establish Rebbi Eliezer even like the Rabbanan?
(a) The Beraisa forbids someone to walk around his field on Shabbos to see
what needs repairing.
Answers to questions
(b) What else does the same Beraisa forbid for the same reason?
(c) Then how could Rabah explain the above-mentioned Beraisa to permit
going to the Techum to make an Eruv just because he does not need to say
anything. Why is that any better than the previous two cases which are