Is a worshipper considered to have caught the bowing (ruku') if he joins the Imam while he is bowing, says the opening takbir (takbirat al-ihram), and bows, then the Imam rises from bowing before the worshipper says "Subhan Rabbi al-Azim" (Glory be to my Lord, the Most Great) or after he has said it once?
Whoever catches the Imam in bowing and bows with him has caught the unit (rak'ah), even if he did not say "Subhan Rabbi al-'Azim" (Glory be to my Lord, the Most Magnificent). The important thing is to catch the Imam while he is bowing.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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