TB Khullin 86b-87a When going to services is not considered an interruption in the middle of a meal

Before the shokhet, the person who slaughters the animal, slaughters the animal, he recites the blessing “בָרוּךְ אַתָה ה' אֱ-לֹהֵינוּ מֶלֶךְ הָעוֹלָם אֲשֶר קִדְשָנוּ בְמִצְוֹתָיו וְצִוָנוּ עַל הַשְחִיטָה- Praised are You, Lord our God, King of the universe, who has sanctified us with His commandments and commanded us concerning slaughtering.” The blessing acknowledges the sacred nature of the act, but the prayer itself does not make an animal kosher—the animal must already be a kosher species and the slaughter must strictly follow precise ritual laws.

The question arises whether one blessing will be sufficient for the slaughtering of many animals or must the shokhet recite a blessing before each animal because the covering of the blood interrupts the slaughter of one animal to the next. The Gemara tries to answer this question by relating it to a story concerning Grace after meals.

“As it occurred that Rav Beruna and Rav Ḥananel, the students of Rav, were sitting together at a meal, and Rav Yeiva the Elder stood over them to serve them. They said to him: Give us a cup of wine over which to recite the blessings of Grace after Meals. They then changed their mind and said to him: Give us a cup of wine to drink. Rav Yeiva the Elder said to them that this is what Rav said: Once someone at a meal says: Give me a cup over which to recite the blessings of Grace after Meals, it is prohibited for him to drink any more wine, since he has expressed his desire to conclude his meal. If he now wishes to drink more wine, he must recite a blessing before drinking it. Ravina asks: Here too, since he is required to cover the blood of the undomesticated animal before slaughtering the bird, there is an interruption between the acts of slaughter, and he has therefore become obligated to recite a new blessing before slaughtering the bird.

“The Gemara rejects this: How can these cases be compared? There, in the incident involving the students of Rav, it is impossible to drink and recite a blessing simultaneously. Accordingly, by requesting a cup over which to recite the blessing of Grace after Meals, they demonstrated their desire to cease drinking. Here, when one covers the blood of the undomesticated animal before slaughtering the bird, it is possible to slaughter the bird with the one hand and cover the blood of the undomesticated animal with the other one. Accordingly, the act of covering the blood of the undomesticated animal is not considered an interruption of the acts of slaughter, since they could have been performed simultaneously.” (TB Khullin 86b-87a, Sefaria.org translation)

Tosefot ד"ה מִשְתֵא וּבָרוֹכֵי בַהֲדֵי הֲדָדֵי לָא אֶפְשָר quoting daf TB Pesakhim 102b teaches when going to services are not considered an interruption in the middle of a meal. “If some of the people remain at the meal and others leave to go to the synagogue, when they return they are not obligated to recite the motzi again neither retroactively or a priori even though they interrupted the meal by praying in between time.” (My translation)