What is meant by the Hadith: "If the prayer is established, then there is no prayer except the prescribed (Maktubah) one"? Is it specific to the time of prayer beginning, or to someone who comes to the mosque and leaves the Sunnah prayers to pray with the Imam, or does it include a woman who prays at home and leaves the pre-prayer Sunnahs upon hearing the Iqamah?
There is no harm in performing supererogatory prayers (nafl) when the congregational prayer (iqama) is being established in the mosque. The prohibition mentioned in the hadith does not include someone who was praying in his home; rather, it applies to someone who is praying with the congregation.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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