כי הוינא בבבל הוה אמרינן: הא דתניא יום הכיפורים שחל להיות ערב שבת — לא היו תוקעין, ובמוצאי שבת — לא היו מבדילין, דברי הכל היא. כי סליקנא להתם, אשכחיתיה ליהודה בריה דרבי שמעון בן פזי דיתיב וקאמר: רבי עקיבא היא, דאי רבי ישמעאל, כיון דאמר חלבי שבת קריבין ביום הכיפורים, ליתקע, כי היכי דליהוי ידעי דחלבי שבת קריבין ביום הכיפורים. ואמינא ליה אנא: כהנים זריזין הן.
When I was in Babylonia, I said with regard to that which was taught in a baraita: If Yom Kippur occurred on Friday, they would not sound the shofar as they did every Friday to herald the start of Shabbat; and if Yom Kippur occurred at the conclusion of Shabbat, they would not recite havdala to mark the end of the sanctity of Shabbat and the start of the sanctity of Yom Kippur, is a statement accepted by all. When I went to Eretz Yisrael, I found Yehuda, son of R' Shimon ben Pazi, who sat and said: This baraita is in accordance with the opinion of R' Akiva, as it equates the sanctity of Yom Kippur with that of Shabbat. As, if you say that it is in accordance with the opinion of R' Yishmael, then, since R' Yishmael said that fats from Shabbat are offered on Yom Kippur, let them sound the shofar so that the priests will know that the fats from Shabbat are offered on Yom Kippur and they may begin offering them (Rav Hai Gaon). And I said to him: You cannot prove this from here, because priests are vigilant and can be trusted to know this on their own, and there is no need to sound the shofar.