Pesachim 86A

מאי לאו, דאכלי באיגרא ואמרי באיגרא! לא: דאכלי בארעא ואמרי באיגרא.

What, is it not the case that they eat the Paschal lamb on the roof and say hallel on the roof, which would mean that roofs have the sanctity of Jerusalem? The Talmud responds: No, there is no proof from here, as it is possible that they eat on the ground and say hallel on the roof.

איני? והתנן: אין מפטירין אחר הפסח אפיקומן, ואמר רב: שלא יעקרו מחבורה לחבורה. לא קשיא: כאן ⁠— בשעת אכילה, כאן ⁠— שלא בשעת אכילה.

The Talmud asks: Is that so? But didn’t we learn in a Mishnah: We do not conclude after eating the Paschal lamb with afikoman, and Rav said that this means that after eating the Paschal lamb one may not say: Afikoman, which refers to removing the utensils in order to go eat somewhere else, because they may not uproot themselves from one group to another group. This would indicate that one must complete the entire Passover seder in one place. The Talmud answers: It is not difficult. Here, where it says that one may not change places, it is during the time of eating. There, where it says they would say hallel on the roof, it is not during the time of eating.

תא שמע, אבא שאול אומר: עליית בית קדשי הקדשים חמורה מבית קדשי הקדשים. שבית קדשי הקדשים ⁠— כהן גדול נכנס לו פעם אחת בשנה, ועליית בית קדשי הקדשים ⁠— אין נכנסין לה אלא פעם אחת בשבוע, ואמרי לה: פעמים בשבוע, ואמרי לה: פעם אחת ביובל, לידע מה היא צריכה.

The Talmud attempts to bring another proof with regard to this issue. Come and hear a resolution to this issue based upon the following baraita: Abba Shaul says: The upper story of the chamber of the Holy of Holies is more stringent with regard to the prohibition to enter it than the chamber of the Holy of Holies itself. How so? With regard to the chamber of the Holy of Holies, the High Priest would enter it once a year on Yom Kippur in order to offer the incense and sprinkle the blood between the staves of the ark, whereas the upper story of the chamber of the Holy of Holies is not entered except for once in 7 years; and some say twice in 7 years, and some say just one time in a Jubilee, i.e., once in 50 years, to see what it needs in case there are renovations that must be done. This indicates that the sanctity of the upper story was even greater than that of the Sanctuary itself.