א מָאן דַּחֲזָא חֶלְמָא, וְלָא יָדַע מַאי חֲזָא, נֵיקוּם קָמֵי כֹּהֲנֵי בְּשָׁעָה שֶׁעוֹלִים לַדּוּכָן וְנֵימָא הָכֵי: רִבּוֹנוֹ שֶׁל עוֹלָם, אֲנִי שֶׁלָּךְ וַחֲלוֹמוֹתַי שֶׁלָּךְ וְכו', וִיכַוֵּן דִּלְסַיֵּם גַּם בַּהֲדֵי כֹּהֲנֵי, דְּעָנֵי צִבּוּרָא אָמֵן; וְאִי לָא, לֵימָא הָכֵי: אַדִּיר בַּמָּרוֹם שׁוֹכֵן בִּגְבוּרָה, אַתָּה שָׁלוֹם וְשִׁמְךָ שָׁלוֹם, יְהִי רָצוֹן שֶׁתָּשִׂים עָלֵינוּ שָׁלוֹם. הַגָּה: וּבְמָקוֹם שֶׁאֵין עוֹלִין לַדּוּכָן, יֹאמַר כָּל זֶה בְּשָׁעָה שֶׁהַשְּׁלִיחַ צִבּוּר אוֹמֵר שִׂים שָׁלוֹם, וִיסַיֵּם בַּהֲדֵי שְׁלִיחַ צִבּוּר, שֶׁיַּעֲנוּ הַקָּהָל אָמֵן (הָרַ"ן פ' הָרוֹאֶה).
1 The "Ribono Shel Olam" ("Master of the World") [Prayer] That We Say During the Lifting of the Hands [the Priestly Blessing], Containing 1 S'if: One who saw a dream and did not know what one saw should stand before the Kohanim when they ascend the platform [for the priestly blessing] and say this: "Master of the world, I am Yours and my dreams are Yours, etc.". And one should aim to finish along with the Kohanim [finishing their blessing] as the congregation answers "Amen". And if not [i.e., if one finished before the Kohanim finished their blessing], one should say this: "Majestic One on high, Who dwells in power, You are peace and Your Name is Peace. May it be Your will that You bestow peace upon us". Rema: And in a place where they do not ascend the platform [to perform Birkat Kohanim], one should say all this while the prayer leader says "Sim Shalom" and finish along with the prayer leader as the congregation answers "Amen" [to both]. (The Ran - chapter "Haro'eh" [Talmud B'rakhot, Chapter 9])