Does one fulfill the obligation of Shema if they did not have kavvanah (concentration/intent) during the first verse?

PrayerShema

Synopsis

All authorities agree that kavvanah is indispensable for the first verse of Shema. Even according to those who hold mitzvot do not require kavvanah generally, the first verse of Shema requires it. If one lacked kavvanah for the first verse, one must repeat Shema.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

Discussion

Discussion coming soon.

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