Mishna: On the eve of Pesach, from just before the time for Minchah, a person does not eat – until it gets dark. Even a poor person from among Israel does not eat until he reclines at seder. And we do not give him less than four cups of wine, and even if his sustenance is from the communal giving.
Gemara: Why specifically the eves of Pesachs? Even the eves of Sabbaths and Festivals as well, as it is taught: a person does not eat on the eves of Sabbaths and festivals from the time of minchah and onwards, so that he will enter to the Sabbath with appetite – the words of Rabbi Yehudah. Rabbi Yosei says: one may eat and walk until it gets dark. Rav Huna says: It is not necessary to teach this except for the position of Rabbi Yosei, for he said “one may eat and drink until it gets dark”. What case is he dealing with? with the eves of Sabbaths and festivals, but on the eve of Pesach, because of the obligation of matzah, he acknowledges that one should refrain.
Rav Papa said, even if you say it’s Rabbi Yehudah, and there he discusses eves of Sabbaths and festivals — from the time of minchah and onwards he forbids eating, but just prior to minchah, he permits; but on the eve of the Pesach, even just prior to minchah, he also forbids.
And on the eve of Sabbath just prior to Minchah he permits eating? But it was taught: A person does not eat on the eve of Shabbat and festivals from the ninth hour and onwards, so that he will enter into Shabbat with an appetite — the words of Rabbi Yehudah; Rabbi Yosei says he eats and walks until it gets dark.
Mar Zutra said: Who is it who says that this teaching is traditional?