Berakhot 8B

ואפילו ״עטרות ודיבן״. שכל המשלים פרשיותיו עם הצבור מאריכין לו ימיו ושנותיו.

This applies to every verse, even a verse like: “Atarot and Divon and Yazer and Nimra and Ḥeshbon and Elaleh and Sevam and Nevo and Beon” (Numbers 32:3). While that verse is comprised entirely of names of places that are identical in Hebrew and Aramaic, one is nevertheless required to read the verse twice and its translation once, as one who completes his Torah portions with the congregation is rewarded that his days and years are extended.

רב ביבי בר אביי סבר לאשלומינהו לפרשייתא דכלא שתא במעלי יומא דכפורי, תנא ליה חייא בר רב מדפתי: כתיב: ״ועניתם את נפשתיכם בתשעה לחדש בערב״.

Rav Beivai bar Abaye thought to finish all the Torah portions of the entire year, which he had been unable to complete at their appointed time, on the eve of Yom Kippur when he would have time to do so. But Ḥiyya bar Rav of Difti taught him: It is written with regard to Yom Kippur: “And you should afflict your souls on the 9th day of the month in the evening, from evening to evening you should keep your Sabbath” (Leviticus 23:32).

וכי בתשעה מתענין?! והלא בעשרה מתענין! אלא לומר לך כל האוכל ושותה בתשיעי, מעלה עליו הכתוב כאילו מתענה תשיעי ועשירי.

The Talmud wonders: And does one fast on the 9th of Tishrei? Doesn’t one fast on the tenth of Tishrei, as the Torah says at the beginning of that portion: “However, on the 10th day of this 7th month is Yom Kippur; there should be a holy convocation for you, and you should afflict your souls” (Leviticus 23:27)? Rather, this verse comes to tell you: One who eats and drinks on the 9th day of Tishrei in preparation for the fast the next day, the verse ascribes him credit as if he fasted on both the 9th and the tenth of Tishrei. Ḥiyya bar Rav of Difti cited this verse to Rav Beivai bar Abaye to teach him that Yom Kippur eve is dedicated to eating and drinking, not to completing the Torah portions one may have missed throughout the year.