Sahih al-Bukhari 789
صحيح البخاري#789Sahihحَدَّثَنَا يَحْيَى بْنُ بُكَيْرٍ، قَالَ حَدَّثَنَا اللَّيْثُ، عَنْ عُقَيْلٍ، عَنِ ابْنِ شِهَابٍ، قَالَ أَخْبَرَنِي أَبُو بَكْرِ بْنُ عَبْدِ الرَّحْمَنِ بْنِ الْحَارِثِ، أَنَّهُ سَمِعَ أَبَا هُرَيْرَةَ، يَقُولُ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِذَا قَامَ إِلَى الصَّلاَةِ يُكَبِّرُ حِينَ يَقُومُ، ثُمَّ يُكَبِّرُ حِينَ يَرْكَعُ، ثُمَّ يَقُولُ سَمِعَ اللَّهُ لَمِنْ حَمِدَهُ. حِينَ يَرْفَعُ صُلْبَهُ مِنَ الرَّكْعَةِ، ثُمَّ يَقُولُ وَهُوَ قَائِمٌ رَبَّنَا لَكَ الْحَمْدُ ـ قَالَ عَبْدُ اللَّهِ {بْنُ صَالِحٍ عَنِ اللَّيْثِ} وَلَكَ الْحَمْدُ ـ ثُمَّ يُكَبِّرُ حِينَ يَهْوِي، ثُمَّ يُكَبِّرُ حِينَ يَرْفَعُ رَأْسَهُ، ثُمَّ يُكَبِّرُ حِينَ يَسْجُدُ، ثُمَّ يُكَبِّرُ حِينَ يَرْفَعُ رَأْسَهُ، ثُمَّ يَفْعَلُ ذَلِكَ فِي الصَّلاَةِ كُلِّهَا حَتَّى يَقْضِيَهَا، وَيُكَبِّرُ حِينَ يَقُومُ مِنَ الثِّنْتَيْنِ بَعْدَ الْجُلُوسِ.
And narrated Abu Huraira:Whenever Allah's Messenger (ﷺ) stood for the prayer, he said Takbir on starting the prayer and then on bowing. On rising from bowing he said, "Sami`a llahu liman hamidah," and then while standing straight he used to say, "Rabbana laka-l hamd" (Al- Laith said, "(The Prophet (ﷺ) said), 'Wa laka l-hamd'." He used to say Takbir on prostrating and on raising his head from prostration; again he would Say Takbir on prostrating and raising his head. He would then do the same in the whole of the prayer till it was completed. On rising from the second rak`a (after sitting for at-Tahiyyat), he used to say Takbir
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 10:184