Al-Bara’ b. ‘Azib said:We used to pray behind the Prophet, and when he said, "God listens to him who praises Him," none of us bowed his back till the Prophet placed his forehead on the ground. (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب الصلاة / 1136
Hadith Gradingالألبانی:مُتَّفق عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (811) و مسلم (197/ 474)»