במדבר פרק ו, כג כֹה תְבָּרֲכוּ אֶת-בְנֵּי יִשְרָּאֵּל:
The Gemara (Sotah 39a) says this verse refers to the “raising of the hands”, and (Kesuvos 25b) indicates “you” (Cohanim), and not zarim (non-priests).
Rabbi Epstein heard from a trustworthy person in Vilna, who heard from his elderly father that heard from the Goan Rav Yechezkel Landa, head of the Bais Din in Vilna (who died in the year תרל"א at the age of 91) that at the Chupah of Rav Landa, the Vilna Goan placed one hand on Rav Landau’s head when he conveyed the Priestly blessings. When asked about the incident, the Vilna Gaon said that we only find blessing with two hands by the Cohanim in the Bais HaMikdash.
It appears to Rabbi Epstein that many Rabbis and Tzadikim are not careful about this matter and offer blessings to others with two hands. (Please note that the Vilna Goan did many things different than everybody, even different than Ashkenazim)
In concluding his discussion of the Priestly blessing, Rabbi Epstein comments on a question for which he has not been able to find a proper answer. The Gemara cites two actions that a person can take after dreaming a dream. One, the person can go before a group of three and request declaration that the dream is for good and not for bad. Two, a person can appear at the time of the Priestly Blessings and say “Rabeino Shel Olam, I am Yours, and my dreams are Yours, etc.” (as written in the Siddur).
The question is that not a word or even an allusion about either action, are brought in the Rambam’s Yad HaChazaka. And one cannot answer that this is a philosophic matter and not a practical matter and not appropriate to the law, since in at least three other places, the Ramban discusses dreams and attributes a great practical value to dreams.
