אורח חיים תע״טOrach Chayim 479

Se’if 1א׳

אַחַר כָּךְ מוֹזְגִין לוֹ כּוֹס שְׁלִישִׁי, וּמְבָרֵךְ עָלָיו בִּרְכַּת הַמָּזוֹן וּבוֹרֵא פְּרִי הַגֶּפֶן, וְשׁוֹתֵהוּ בַּהֲסַבָּה; וְלֹא יְבָרֵךְ אַחֲרָיו וְלֹא יִשְׁתֶּה יַיִן בֵּינוֹ לְכוֹס רְבִיעִי. הַגָּה: מִיהוּ מִכּוֹס שְׁלִישִׁי יָכוֹל לִשְׁתּוֹת כַּמָּה פְּעָמִים וְהַכֹּל מִחְשַׁב שְׁתִיָּה אַחַת, אַף עַל גַּב דְּהִפְסִיק בֵּינְתַיִם (מַהֲרִי"ל וּמַהֲרִ"י וְתַשְׁבֵּ"ץ). מִצְוָה לַחֲזֹר אַחַר זִמּוּן. הַגָּה: וְהַגָּדוֹל שֶׁבָּהֶן אוֹמֵר הוֹדוּ וְאָנָּא, וְהָאֲחֵרִים עוֹנִין אַחֲרָיו (כָּל בּוֹ). וְהַגָּדוֹל יָכוֹל לִתֵּן לַקָּטָן רְשׁוּת (מַהֲרִי"ל). וְיָכוֹל לְצָרֵף לַזִּמּוּן לְעִנְיַן הַלֵּל, אַף עַל גַּב שֶׁלֹּא אָכַל עִמָּהֶם. וְנָהֲגוּ שֶׁבַּעַל הַבַּיִת מְבָרֵךְ בִּרְכַּת הַמָּזוֹן בְּלֵיל פֶּסַח, שֶׁנֶּאֱמַר: טוֹב עַיִן הוּא יְבֹרַךְ (מִשְׁלֵי כב, ט) וְהוּא מִקְרֵי טוֹב עַיִן שֶׁאָמַר כָּל דִּכְפִין יֵיתֵי וְיֵיכוּל וְכו'.

Grace After Meals on the Third Cup. Contains one section: After eating the afikoman, we mix the third cup and bless the Grace After Meals and Creator of the fruits of the vine upon it, then one drinks it while reclining. And one neither blesses a post-consumption blessing upon this third cup, nor should one drink wine between the third cup and the fourth cup. Rema: However, one is able to drink many times from the third cup and all of it is considered as one drinking, even though one interrupts between these drinkings (Maharil, Maharai, and Tashbetz). It is a mitzvah to repeat after the zimun. Rema: And the greatest among them says "Hodu" and "Ana" and the others respond after him (Kol Bo). And the greatest may give permission to a younger person (Maharil). And one may join the zimun for the purpose of Hallel even though he did not eat with them. And the custom is that the homeowner recites the Grace After Meals on Passover night, as it is said, "He who has a good eye shall be blessed" – and he is called "good eyed" since he said "Let all who are hungry come and eat," etc.