אורח חיים נ״וOrach Chayim 56

Se’if 1א׳

יֵשׁ לְכַוֵּן בַּעֲנִיַּת הַקַּדִּישׁ: הַגָּה: וְלֹא יַפְסִיק בֵּין יְהֵא שְׁמֵיהּ רַבָּא מְבָרַךְ (הַגָּהוֹת אֲשֵׁרִ"י בְּשֵׁם אוֹר זָרוּעַ כָּתַב דִּלְפֵרוּשׁ רִאשׁוֹן לֹא יַפְסִיק בֵּין שְׁמֵיהּ לְרַבָּא וּלְפֵרוּשׁ ר"י אֵין לְהַפְסִיק בֵּין רַבָּא לִמְבָרַךְ) וְלַעֲנוֹת אוֹתוֹ בְּקוֹל רָם, וּלְהִשְׁתַּדֵּל לָרוּץ כְּדֵי לִשְׁמֹעַ קַדִּישׁ: הַגָּה: וְיֵשׁ לַעֲמֹד כְּשֶׁעוֹנִין קַדִּישׁ וְכָל דָּבָר שֶׁבַּקְּדֻשָּׁה, וּמִי שֶׁבָּא לְבֵית הַכְּנֶסֶת וְשׁוֹמֵעַ הַקָּהָל עוֹנִין קַדִּישׁ, עוֹנֶה עִמָּהֶם, אַף עַל פִּי שֶׁלֹּא שָׁמַע שְׁלִיחַ צִבּוּר שֶׁאָמַר יִתְגַּדַּל וְכו' (הַגָּהוֹת חֲדָשִׁים בְּמָרְדְּכַי דִּבְרָכוֹת) וְגַם הַשְּׁלִיחַ צִבּוּר צָרִיךְ לוֹמַר יְהֵא שְׁמֵיהּ רַבָּא. וּכְשֶׁמַּתְחִיל יִתְגַּדַּל י"ל וְעַתָּה יִגְדַּל נָא כֹּחַ וְגו' זְכֹר רַחֲמֶיךְ וְגו'.

Laws of the Congregation's responding to the Kaddish (5 sections): One should have concentration when answering the Kaddish. Rem"a: And one does not interrupt between "Y'hei Sh'meih Rabbah" ("May the Great Name") and "M'varakh" ("be blessed") [Hagahot Asheri in the name of Or Zarua wrote regarding the first explanation: "One should not interrupt between "Sh'meih" and "Rabbah" and according to the explanation of the Ri: one should not interrupt between "Rabbah" and "M'varakh"]. and one should answer loudly and strive to run to hear Kaddish. Rem"a: And one should stand when answering Kaddish and any davar she-bikdushah ("matter in which there is holiness" - a recitation which requires a minyan). And one who comes to synagogue and hears the congregation answering Kaddish answers along with them even though he did not hear the prayer-leader saying "Yitgadal etc." [Hagahot Chadashim on the Mordechai on Brakhot]. And the prayer-leader also needs to say "Y'hei Sh'meih Rabbah...". And when he begins "Yitgadal...", one should say "And now, let power [of YHVH] be magnified..." (Numbers 14:17) and "Remember Your mercy..." (Psalms 25:6).

Se’if 2ב׳

כְּשֶׁשְּׁלִיחַ צִבּוּר אוֹמֵר יִתְבָּרַךְ כָּל הָעָם עוֹנִין אָמֵן, וְכֵן כְּשֶׁאוֹמֵר בְּרִיךְ הוּא, וְכֵן כְּשֶׁאוֹמֵר וְאִמְרוּ אָמֵן: וְלֹא נָהֲגוּ לוֹמַר אָמֵן אַחַר יִתְבָּרַךְ, וְלֹא אַחַר בְּרִיךְ הוּא, וְלֹא יַפְסִיק בֵּין בְּרִיךְ הוּא לְעֵלָּא מִכָּל בִּרְכְּתָא וְכו':

When the chazzan says: "yitbarakh" everyone should answer "amen", and so too when he says "b'rikh hu", and "v'imru amen". Rem"a: And the custom is to not say "amen" after "yitbarakh" and not after "b'rikh hu". And one may not interrupt between "b'rikh hu" and "l'eila mikol birkhata..."

Se’if 3ג׳

הָעוֹנִים עַד לְעָלְמֵי עָלְמַיָּא בִּלְבַד טוֹעִים הֵם, כִּי אָסוּר לְהַפְרִיד בֵּין עָלְמַיָּא לְיִתְבָּרַךְ.

Those who respond up until "l'almai almaya" only [and stop] - they err, for it is forbidden to interrupt between "almaya" and "yitbarakh".