Maaseh Rav Siman 46
Can copy this into an AI, or connect the whole library to your assistant. For deeper learning, you can directly use the original seforim, sites, and apps.
ברכת כהנים לשמוע מפי הש"ץ ולומר כן יהי רצון:
Sefaria Community Translation
The Blessing of 'Birkat Cohanim' should be heard from the mouth of the ḥazzan and one should respond 'Kein Yehi Ratzon' (It shall be His will).