Sahih al-Bukhari 815
Book 10: Call to Prayers (Adhaan) · Narrated by Ibn `Abbas
Arabic
حَدَّثَنَا أَبُو النُّعْمَانِ، قَالَ حَدَّثَنَا حَمَّادٌ ـ وَهْوَ ابْنُ زَيْدٍ ـ عَنْ عَمْرِو بْنِ دِينَارٍ، عَنْ طَاوُسٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ أُمِرَ النَّبِيُّ صلى الله عليه وسلم أَنْ يَسْجُدَ عَلَى سَبْعَةِ أَعْظُمٍ، وَلاَ يَكُفَّ ثَوْبَهُ وَلاَ شَعَرَهُ.
English translation
Narrated Ibn `Abbas:The Prophet (ﷺ) was ordered to prostrate on seven bony parts and not to tuck up his clothes or hair
Reference: Sahih al-Bukhari 815, Book of Call to Prayers (Adhaan). English translation by Dr. Muhammad Muhsin Khan.