What is the reasoning behind the prohibition of eating after the Korban
Pesach? According to Rav, it is clearly a Gezeirah to prevent one from
transgressing the Isur d'Oraisa of eating the Pesach in two places. What,
though, is the reasoning according to Shmuel, who prohibits eating after the
Korban Pesach even in the *same* place? Furthermore, what is the reason for
the prohibition of eating after the *Matzah* ("Afikoman") nowadays?
(a) The RASHBAM (DH Kegon) explains that the reason for not eating after the
Pesach or Matzah is in order that the taste of the Pesach or Matzah remain
in one's mouth, as the Gemara itself implies. (That is, the Gemara says that
we might have thought that the Halachah does not apply to the meat of the
Korban Pesach, since it is so fatty and its taste remains in one's mouth
even when he eats other things after it, and therefore we need to be told
that the Halachah *does* apply nonetheless; from here we see that the reason
for not eating afterwards is so that the taste will remain in one's mouth.)
The RAMBAM (Hilchos Chametz u'Matzah 8:9) also cites this reason.
Why, though, is it so important that the taste remain in one's mouth? By
making sure that the taste of the Pesach or Matzah lingers on in one's
mouth, one shows his love for the Mitzvah, as if he wants it to stay with
him longer.
(b) The RASHBAM mentions another reason for not eating after the Pesach, and
that is in order to see to it that the Korban Pesach is eaten while one is
satiated, "Al ha'Sova." The meat of the Pesach must be the food that fills a
person. How does this conform with our Gemara which mentions that the reason
is because of the *taste* of the Pesach?
TOSFOS (120a, DH Maftirin) explains that when the Gemara says that the taste
of the Pesach or Matzah must remain in one's mouth, it is discussing the
opinion which says that one may not eat after the Pesach nor after the
Matzah nowadays. The other opinion, which says that this prohibition applies
only to Pesach, cannot learn that the reason is because of taste, because if
so, that should be *more* of a reason not to eat after the Matzah and *less*
of a reason not to eat after the Pesach, for the taste of the Pesach is
strong and lingers even when one eats something else afterwards. It must be
that this opinion has a different reasoning for the prohibition and holds
that the reason is because the Pesach must be eaten "Al ha'Sova," which is a
way of honoring food which is Kodesh. Matzah, nowadays, is only
commemorative of the Korban Pesach, and it is not actually Kodesh, and
therefore this opinion holds that there is no prohibition to eat after the
Matzah.
RABEINU MANO'ACH (commenting on the Rambam, loc. cit.) gives a different way
to resolve why the Gemara gives the reason of taste, if the reason is
because the Pesach must be eaten "Al ha'Sova." He says that the Gemara here
really means that one may not eat after the Pesach because of the reason of
"Al ha'Sova." However, that reason only explains why it may not be eaten at
the *beginning* of the meal, but it does not explain why it must be the very last thing which one eats. Therefore, it is necessary to have the additional
reason that the taste must remain in one's mouth. However, if that was the
only reason for not eating after the Pesach, we might have thought that
since the point of having the taste linger on is so that the person enjoy
the Pesach more, it shoud be even better if he eats it at the very beginning
of the meal, when he has a strong appetite for it. Therefore, we need the
reasoning of eating Pesach "Al ha'Sova" to teach that it may not be eaten at
the very beginning of the meal.
(c) The RAN explains that according to Shmuel and Rebbi Yochanan, the reason
for leaving the taste of the Pesach in one's mouth has nothing to do with
showing love for the Mitzvah. Rather, they agree with Rav that the
prohibition to eat after the Pesach is a Gezeirah to prevent one from
inadvertently eating the Pesach in two different locations. The concern is
that if he eats something after the Pesach, he will lose the taste of the
Pesach and forget whether or not he ate it. He will mistakenly think that he
still needs to eat it, and he will go to another location and eat the Pesach
there, thereby transgressing the Isur d'Oraisa of eating the Korban Pesach
in two places.
The opinion which holds that the prohibition does not apply to Matzah
maintains that since Matzah is only commemorative of the Korban Pesach, the
Rabanan were not so strict as to prohibit eating after Matzah, since there
is no Isur to eat Matzah in another place.
(d) The BA'AL HA'ME'OR explains that the reason for not eating after the
Pesach or Matzah is to leave the taste in one's mouth, so that one does not
forget to say *Hallel*. We learned (86a) that after eating the Korban
Pesach, the people would go to a different, less crowded place to say
Hallel. There is a fear that if they leave the places of their Chaburos in
order to go somewhere else to say Hallel, they will forget to say Hallel and
just go straight home. Therefore, they must keep the taste of the Pesach in
their mouths to remind them to say Hallel.