Zevachim 97A

השפוד והאסכלא ⁠– מגעילן בחמין.

With regard to the spit and the metal grill [askela], one purges them in hot water.

גמ׳ מאי טעמא דרבי טרפון? דאמר קרא: ״ופנית בבקר והלכת לאהלך״⁠ – הכתוב עשאן לכולן בקר אחד.

Talmud: The Mishnah teaches that R' Tarfon says: If one cooked a sin offering in a vessel from the beginning of the Festival, one may cook in it for the entire Festival without scouring and rinsing the vessel after every use and without being concerned that he is eating forbidden leftover meat. The Talmud asks: What is the reasoning of R' Tarfon? The Talmud answers: It is as the verse states with regard to the Paschal offering: “And you should roast and eat it in the place that YHWH your God should choose; and you should turn in the morning, and go to your tents” (Deuteronomy 16:7). Although one does not leave Jerusalem on the first morning of Passover, the verse has rendered all of those days over which one remains there equal to one morning.

מתקיף לה רב אחדבוי בר אמי: וכי אין פיגול ברגל, ואין נותר ברגל?!

Rav Aḥadvoi bar Ami objects to this: Can it be that all of the days of the Festival are considered a single day? But is there no prohibition against bringing an offering that was sacrificed with the intent to consume it after its appointed time [piggul] during a pilgrimage Festival? And is there no prohibition of notar, consuming sacrificial meat beyond its appointed time, during a pilgrimage Festival? Both these prohibitions are based on the premise that each offering may be eaten over a limited time far less than the duration of the entire Festival.

וכי תימא הכי נמי; והתניא, רבי נתן אומר: לא אמר רבי טרפון אלא זו בלבד!

And if you would say: Indeed, neither piggul nor notar apply during a Festival, that is difficult: But it is taught in a baraita that R' Natan says: R' Tarfon said that an entire Festival is considered a single day only with regard to this, the halakhot of scouring and rinsing, alone, and not with regard to other halakhot, including piggul and notar. Evidently, his opinion is not based on the cited verse.