What is the ruling on the prayer of an Imam who makes a mistake in his prayer and does not perform the prostration of forgetfulness (Sujud al-Sahw), but rather the muezzin informs him of it, whereupon he completes his prayer, with a prior agreement between them?
The agreement between the Imam and the Mu'adhdhin to alert the Imam with the Takbir (Allahu Akbar) is contrary to the Sunnah. The Sunnah is for men to alert the Imam with Tasbih (Subhanallah) by saying: "Subhanallah." The prayer is valid.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
Read the full answer on Ftawyhttps://ftawy.com/en/questions/175842