Hadith
Riyad as-Salihin #747
The Book of the Remembrance of Allah· كتاب الأذكار
riyad_as_salihin:747وعنها أن رسول الله صلى الله عليه وسلم كان يقول في ركوعه وسجوده: "سبوح قدوس رب الملائكة والروح" ((رواه مسلم)).
The Messenger of Allah (ﷺ) used to recite in his bowing and prostration: "Subbuhun Quddusun, Rabbul-mala'ikati war-ruh .
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