Sahih al-Bukhari 801
Sahih al-Bukhari · Book 10: Call to Prayers (Adhaan) · To stand Straight with calmness on raising the head from bowing
Narrated Al-Bara':
حَدَّثَنَا أَبُو الْوَلِيدِ ، قَالَ حَدَّثَنَا شُعْبَةُ ، عَنِ الْحَكَمِ ، عَنِ ابْنِ أَبِي لَيْلَى ، عَنِ الْبَرَاءِ ـ رضى الله عنه ـ قَالَ كَانَ رُكُوعُ النَّبِيِّ صلى الله عليه وسلم وَسُجُودُهُ وَإِذَا رَفَعَ رَأْسَهُ مِنَ الرُّكُوعِ وَبَيْنَ السَّجْدَتَيْنِ قَرِيبًا مِنَ السَّوَاءِ.
The bowing, the prostrations, the period of standing after bowing and the interval between the two prostrations of the Prophet (ﷺ) used to be equal in duration .