(ד לד) “יחדו שמו ונרוממה אתי ‘לה גדלו”
The Mefaresh in Maseches Nazir (66b ad loc. Echad) explains that this passuk expresses the joint power of the mevarech and the oneh amen. The beginning of the passuk “Gadlu l’Hashem iti” are the words of the mevarech, who calls on others to glorify Hashem with him by answering amen, while the later words “uneromemah Shemo yachdav” – applies to the oneh amen, who joins the mevarech and elevates the Name of Hashem with him.
As we know, answering amen is not only an agreement with the words of the mevarech, it is also part of the brachah, and by answering amen, the brachah is completed and through that the brachah itself becomes more important. (See Mishnah Berurah 167 20)
In light of this we can explain the deep meaning of this passuk as follows: The mevarech calls to others “gadlu l’Hashem iti” – it is in your hands to make my brachah greater and to complete it with one word that it lacks – amen. And when others answer amen they are saying that by doing so they also elevate and increase the importance of the brachah – “uneromemah Shemo yachdav.” (Ohel Shlomo)
