Rif Brachot 30a

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30a

{Brachot 42a}
[Rav Huna ate thirteen rolls of pat haba`a bekhisnin] of three to a kav without saying a blessing {after them}.

Rav Nachman said: Anything which others make the mainstay of a meal {establish their meal with it} requires a blessing {grace to be said after it} and anything which others do not make the mainstay of a meal he does not need to bless {after it}.

And the conclusion is: when he eats them under the category of kisnin {nibblings} beforehand he blesses Borei Minei Mezonot and afterwards nothing at all, and when he eats them under the category of establishing {a meal}, he blesses upon them Hamotzi and Birchat HaMazon. For Rav Yehuda cited Shmuel: rolls {bread wafers}, we may use them to make an eruv, and we bless over them HaMotzi, and we establish {this statement} as referring to when he established his meal on it.

Rav Papa visited the house of Rav Huna son of Rav Natan. After they finished their meal, Rav Papa sat and ate. They said to him: Does Master not hold that once one has finished {the meal} it is forbidden to eat? He said: The proper word in this statement is removed {that is, the table has not yet been removed.}

And the halacha is not like this, but rather, the entire time that he has not washed his hands {in mayim acharonim} for the blessing {Birchat HaMazon}, he may eat, for we say {in the gemara}: "And the halacha is not like any of these reports, but rather like this that Rav Chiyya bar Ashi cited Rav: "There are three 'immediates.' Immediately after leaning {on the sacrificial animal} is slaughter; immediately after geula {the blessing after Shema} is prayer {=Shemoneh Esrei}; immediately after washing the hands is blessing."

MISHNAH.
A BLESSING SAID OVER THE WINE TAKEN BEFORE THE MEAL SERVES ALSO FOR THE WINE TAKEN AFTER THE MEAL.

A BLESSING OVER THE HORS D'OEUVRES TAKEN BEFORE THE MEAL SERVES FOR THE SWEETS TAKEN AFTER THE MEAL.

A BLESSING OVER BREAD SERVES FOR THE SWEETS BUT A BLESSING OVER THE HORS D'OEUVRES DOES NOT SERVE FOR THE BREAD.
BETH SHAMMAI SAY: NEITHER [DOES IT SERVE] FOR A COOKED DISH.

Gemara:
{Brachot 42b}

Rabba bar bar Chana cited Rabbi Yochanan: They only learned this {that the blessing on wine before the meal functions as well for the wine after the meal} regarding Shabbat and Yom Tov, since one establishes him meal over wine {makes it an essential part of him meal}, but on the other days of the year, since one does establishes his meal over water, if he blesses on wine before the meal, it does not exempt the wine after the meal.

By way of explanation, the wine that they drink after the meal, and they have not yet blessed Birchat HaMazon, that is what is termed "wine after the meal." But if theyhave already blessed Birchat HaMazon, for the wine drunk after the meal one needs to bless, and it is not exempt via the blessing made on the wine before the meal, and it then makes no difference if it is in the weekday or Shabbat or Yom Tov, as we learn in arvei pesachim {Pesachim 103b}: Amemar, Mar Zutra, and Rav Ashi sat at a meal, and Rav Acha the son of Rav Ika waited on them.