Pesachim 100B

כך מפסיקין להבדלה. מאי מפסיקין ⁠— לאו לעקירת שולחן? לא, למפה.

so one interrupts for havdala? People eating a meal on Shabbat until after nightfall must interrupt their meal to recite havdala. The Talmud inquires: What is the meaning of the phrase: One interrupts? Is it not referring to removing the table? The Talmud answers: No, it is referring to spreading a cloth, which is sufficient for havdala as well.

רבה בר רב הונא איקלע לבי ריש גלותא, אייתו תכא קמיה, פרס מפה וקידש. תניא נמי הכי: (ושוין) שאין מביאין את השולחן אלא אם כן קידש, ואם הביא ⁠— פורס מפה ומקדש.

The Talmud relates: Rabba bar Rav Huna happened to come to the house of the Exilarch. His hosts were reclining for a meal, and the attendants brought a table before him so he could eat as well. Since Shabbat had already started, he spread a cloth over the food and recited kiddush. That was also taught in a baraita: And the rabbis agree that one may bring the table only if he has already recited kiddush; and if one brought out the table before kiddush, he should spread a cloth over the food and recite kiddush.

תני חדא: שוין שאין מתחילין, ותניא אידך: שוין שמתחילין. בשלמא הא דתניא שוין שאין מתחילין ⁠— משכחת לה בערב הפסח,

It was taught in one baraita: R' Yehuda and R' Yosei, who disagree over whether it is permitted to eat from minḥa time on Friday and whether one must interrupt his meal, agree that one may not begin a meal from this time. And it was taught in the other baraita that they agree that one may begin a meal. The Talmud explains: Granted, that which was taught in the first baraita, that R' Yehuda and R' Yosei agree that one may not begin a meal, you will find that this is correct with regard to the eve of Passover, as even R' Yosei concedes that one may not start a meal on Passover eve ab initio.