Sahih al-Bukhari
Book 10: Call to Prayers (Adhaan)
كتاب الأذان
266 hadith in this book
Chapter 121 And what is said regarding the limit of the completion of bowing and of keeping the back straight and the calmness with which it is performed.
باب حَدِّ إِتْمَامِ الرُّكُوعِ وَالاِعْتِدَالِ فِيهِ وَالاِطْمَأْنِينَةِ
Narrated Al-Bara:
The bowing, the prostration the sitting in between the two prostrations and the standing after the bowing of the Prophet (ﷺ) but not qiyam (standing in the prayer) and qu`ud (sitting in the prayer) used to be approximately equal (in duration).
حَدَّثَنَا بَدَلُ بْنُ الْمُحَبَّرِ، قَالَ حَدَّثَنَا شُعْبَةُ، قَالَ أَخْبَرَنِي الْحَكَمُ، عَنِ ابْنِ أَبِي لَيْلَى، عَنِ الْبَرَاءِ، قَالَ كَانَ رُكُوعُ النَّبِيِّ صلى الله عليه وسلم وَسُجُودُهُ وَبَيْنَ السَّجْدَتَيْنِ وَإِذَا رَفَعَ مِنَ الرُّكُوعِ، مَا خَلاَ الْقِيَامَ وَالْقُعُودَ، قَرِيبًا مِنَ السَّوَاءِ.
Hadith text, translations and grading are courtesy of Sunnah.com.