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prepared by Rabbi Eliezer Chrysler
Kollel Iyun Hadaf, Jerusalem

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Eruvin 100

ERUVIN 100 - has been sponsored by the Jesselson Foundation


(a) Rabah permits sitting on the root of a tree that is lower than three Tefachim - even it is the extension of a root which *is* more than three Tefachim nearer to the tree.
What does Rav Sheshes say about this, and why?

(b) What are the three cases of 'Meshunisa', and what are their three respective Dinim?

(c) What is the difference between 'Anigra' and 'Keren Zavis' and what Din do they have? (See Tosfos DH 've'Chen be'Keren Zavis)?

(a) Rav Yosef permitted sitting on the date-palm that grew through Abaye's roof, which had not yet grown to a height of three Tefachim from the roof. Like whom must he have held to issue such a ruling?

(b) Why might we have thought that even Rav Sheshes will agree with that ruling?

(c) Our Mishnah prohibits sitting on roots that are three Tefachim high. That is obvious. So what is the Chidush ...

  1. ... according to Rav Sheshes?
  2. ... according to Rabah? Why will he agree *here* that it is forbidden?
(a) Why is climbing, leaning or swinging on a tree or an animal forbidden, whereas clambering on to a wall or into a pit is permitted? Is the former more strenuous than the latter?

(b) To reconcile *one* Beraisa, which permits descending from a tree, with *another* which forbids it, we establish the former when he climbed the tree *before* Shabbos, and the latter, *on* Shabbos. In the second answer, the Beraisa permits even someone who climbed it on Shabbos to descend.
What is then the difference between the two Beraisos?

(c) According to the third answer, the two Beraisos actually *do* argue. What is their Machlokes?

(a) What does one do with the blood of ...
  1. ... one Bechor which got mixed up with the blood of another Bechor?
  2. ... one Chatas which got mixed up with the blood of another Chatas?
(b) If the blood of a Chatas got mixed up with the blood of a Bechor, Rebbi Eliezer holds that it must be sprinkled four times.
Why is that?

(c) Rebbi Yehoshua disagrees with Rebbi Eliezer for two reasons.
What are they?

(a) How does the Gemara attempt to connect the above Machlokes with the Sha'aleh of whether someone who climbed a tree is obligated to descend or not?

(b) Why might even Rebbi Eliezer agree that it is preferable for him to remain in the tree?

(c) And why might even Rebbi Yehoshua agree that it is better that he descends?

Answers to questions



(a) Why is it forbidden to climb a tree that has dried up? What constitutes a dried-up tree?

(b) Under which conditions may one climb a dried-up tree in the summer- time, and why is this?

(c) Then why did they forbid the same case in winter?

(d) Why did Rav forbid climbing a dried-up tree in Afsatya - even though there was no fruit on it?

(a) Rav Asi is quoted as forbidding walking on grass on Shabbos.
Does this apply to dry grass?

(b) Why should walking on grass be prohibited?

(c) Even fresh grass is only Asur under certain conditions.
Why does the Gemara conclude that nowadays, walking on grass is permitted in all cases?

(a) Rav Asi bases his initial prohibition on the Pasuk in Mishlei "ve'Atz be'Raglav Chote".
What else do we learn from this Pasuk?

(b) What will happen to someone who forces his wife to have relations with him?

(c) The Pasuk also incorporates forcing one's wife to have relations twice.
What are the rewards of doing this *with* her consent, and why is that?

(a) What advantage does 'a woman who approaches her husband for a D'var Mitzvah have over the generation of Moshe (the knowledgeable generation)?

(b) Who is the prime example of this?

(c) How do we reconcile this with Rav Yitzchak bar Avdimi, who says that one of the curses of Chavah was that women should not approach their husbands?

(a) Chavah was punishment with ten curses. Which curse is hinted in ...
1. + 2. ... "Harbah Arbeh";
3. ... "Itzvonech";
4. ... "ve'Heronech";
5. ... "be'Etzev Teldi Banim";
6. ... "ve'El Ishech Teshukasech";
7. ... "ve'Hu Yimshol Bach".
(b) Rav Dimi describes the remaining three as 1. 'Atufah ke'Avel'; 2. 'u'Menudah mi'Kol Adam'; 3. 'va'Chavushah be'Veis ha'Asurin'. What do they mean?

(c) The Beraisa lists three different curses: That she grows hair long like Lilis (Queen of the Demons), that she sits whilst urinating.
What is the third?

(d) Why did Rav Dimi not list these?

(a) Had the Torah not taught us good character-traits, we would have learnt them from the animals ('mi'Kol Melamdai Hiskalti' - One can [and should] learn good things from all).
What would we have learnt from ...
  1. ... a cat?
  2. ... an ant?
  3. ... a dove?
(b) We would also learn 'Derech Eretz from a rooster'.
What does this mean?

(c) What does the rooster subsequently say to the hen?

Answers to questions
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