If one has already recited Shema and enters a synagogue where the congregation is reciting Shema, must one recite the first verse (Shema Yisrael) with them?

PrayerShema

Synopsis

One who has already recited Shema privately and then enters a synagogue where the congregation is reciting it must say the first verse along with them, so as not to appear as though he refuses to accept the yoke of Heaven together with the community. The obligation is limited to the first verse.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

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