Why is Vayechulu recited during Kiddush if it was already said in the synagogue, and what if one forgot it?

ShabbatKiddush

Synopsis

The Mechaber includes Vayechulu in the home Kiddush despite it being said in synagogue. The Mishnah Berurah explains it is repeated to discharge household members who were not in the synagogue. Multiple sources hold Vayechulu should ideally be said three times on Friday night. If forgotten during Kiddush, it may be said during the meal over a cup.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

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