Is the prayer of those who established their congregational prayer permissible, unknowingly that another congregation was praying, and then became aware of its existence during their prayer but did not pay attention to it and completed their prayer, or must they repeat it?
If someone enters a congregational prayer without knowing that another congregation has already taken place, then there is no blame upon him.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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