Hearing a Blessing from Another
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Question
Hello, In which of the following cases can a person fulfill the obligation of a blessing? - Blessing of enjoyment - Blessing "Whose strength and power fill the world" - Tzitzit - Tefillin
Answer
Hello
I assume your question is whether one can fulfill the obligation by hearing a blessing from another.
A. When the one reciting the blessing is also obligated in the blessing [for example, he also saw the lightning, or he is currently wearing tefillin or a tallit], he can fulfill the obligation for the listener in any blessing.
B. When the one reciting the blessing is not himself obligated in this blessing, he cannot fulfill the obligation for another, except in the blessings of commandments [since all Jews are responsible for one another, it is incumbent upon each to ensure the fulfillment of the commandments by others]. But not in blessings of praise or blessings of sight.
C. In any case, when the one obligated in the blessing can bless himself, he should bless himself and not fulfill the obligation through another. Only if the one obligated in the blessing does not know how to bless himself, or cannot for some reason bless, can he fulfill the obligation in the aforementioned cases by hearing the blessing from his friend.
Source
Mishna Berura, Siman 8, Sifkatan 14, there Siman 167, Sifkatan 92, Siman 197, Sifkatan 17, and other places.
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