Rif Eruvin 20b {Eruvin 68a continues - 68b; 61a}

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20b

{Eruvin 68a continues}
two great men like the Rabbis {=Abaye and Rabba}, that there was no eruv and no shittuf established?
He {Abaye} said to him: How can I help it? Master, it is not his way {=he does usually pay attention to such trifles}, I am preoccupied with my studies, and they do not trouble themselves with it. If I were to {rather than collecting bread from each of them} acquire for them bread in a basket, there will be times that they will want to take it {and use it}, and I will not be able to give it to them {because I cannot really spare it}, and it would thus not be a valid shittuf, for they learnt {in a brayta}: One of the members of the alleyway who wishes to take the wine and the oil {upon which the partnership was formed} and they do not give to him, the shittuf is nullified. {Rabba bar Rav Chanan responded:} But Master could have acquired for them {for the shittuf} a reviit of vinegar that you have in the cask?! {Abaye answered}: But we learnt {in a brayta}: we do not make a shittuf from the storehouse {where the vinegar is kept in bulk}.

And we conclude that this brayta that states that "we do not make a shittuf from the storehouse" is according to Bet Shammai, who does not hold breira {that one can specify later to what part the designation applies}, but according to Bet Hillel, who does hold breira, we may make a shittuf from material in the storehouse.

There was an infant whose warm water spilled. Rava said: Let us ask his mother {if she is in need of warm water} - if it is needed, let a gentile heat up water for him by way of {doing so for} his {=the child's} mother. "But she is eating dates {and is not sick and in need of warm water}!" {Rava:} Delusions have seized her {and she is not aware of what she is eating}.

There was a certain infant whose warm water had spilled.
Rava said: Move my items from the men's quarters {which was connected directly to his courtyard} to the women's courtyard {which, for sake of privacy, was behind the men's quarters and only accessible through the men's quarters, not directly from the courtyard}, so that I will go and sit there {in the women's quarters} and renounce my domain in my courtyard {to the people in the child's courtyard, in order to facilitate carrying}.
Ravina said to Rava: But Shmuel said that there is no renunciation of domain from one courtyard to another.
He {Rava} said to him: I hold like Rabbi Yochanan, who says that there is renunciation of domain from one courtyard to another.
{Ravina said:} If Master does not hold like Shmuel,

{Eruvin 68b}
let Master sit in his place {rather than moving to the women's quarters}, and let him renounce his rights in his courtyard to them {the people in the child's courtyard} and then {after the water had been taken} let them renounce their right back to Master {in the courtyard, so that Rava could once again use it}. For Rav said that we may renounce and return and renounce {back to the initial person}.
{Rava:} In this, I hold like Shmuel, who says that we may not renounce and return and renounce.

And this is the reason that we may not renounce and return and renounce: In order that the words of the Sages do not assume the character of mockery and jest.

And even though Rava said that "In this, I hold like Shmuel, who says that we may not renounce and return and renounce," we establish like Rav, for Rav Ashi, who is later, concludes that Rav and Shmuel differ on the same point upon which Rabbi Eliezer and the Sages argue, and Rav is like the Sages and Shmuel is like Rabbi Eliezer. And we deduce from this that the halacha is like Rav, who says that we may renounce and return and renounce. And so is the halacha.

{Eruvin 61b}
Mishna:
Rabban Gamliel said: It once happened that a Tzeduki {who thus does not accept the institution of eruv} was dwelling with us in an alleyway in Yerushalayim, and Father said to us: Hurry and carry out all the vessels to the alleyway before he {=the Tzeduki} carries out and restricts you.