Berachos6: 6
הָיוּ יוֹשְׁבִין לֶאֱכֹל — כָּל אֶחָד וְאֶחָד מְבָרֵךְ לְעַצְמוֹ. הֵסֵבּוּ — אֶחָד מְבָרֵךְ לְכֻלָּן. בָּא לָהֶם יַיִן בְּתוֹךְ הַמָּזוֹן — כָּל אֶחָד וְאֶחָד מְבָרֵךְ לְעַצְמוֹ; לְאַחַר הַמָּזוֹן — אֶחָד מְבָרֵךְ לְכֻלָּם. וְהוּא אוֹמֵר עַל הַמֻּגְמָר, אַף עַל פִּי שֶׁאֵין מְבִיאִין אֶת הַמֻּגְמָר אֶלָּא לְאַחַר הַסְּעֻדָּה.
[If] they were sitting [together] to eat, each and every one recites the blessings for him-self. [If] they reclined, one recites the blessings for all of them. [If] wine was brought to them during the meal, each and every one recites the blessing for himself; [if wine was brought] after the meal, one recites the blessing for all of them. And he says [the blessing] on the incense, even though they do not bring the incense until af-ter the meal.