Sahih al-Bukhari 812
Sahih al-Bukhari · Book 10: Call to Prayers (Adhaan) · To prostrate on the nose
Narrated Ibn `Abbas:
حَدَّثَنَا مُعَلَّى بْنُ أَسَدٍ ، قَالَ حَدَّثَنَا وُهَيْبٌ ، عَنْ عَبْدِ اللَّهِ بْنِ طَاوُسٍ ، عَنْ أَبِيهِ ، عَنِ ابْنِ عَبَّاسٍ ، رضى الله عنهما قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " أُمِرْتُ أَنْ أَسْجُدَ عَلَى سَبْعَةِ أَعْظُمٍ عَلَى الْجَبْهَةِ ـ وَأَشَارَ بِيَدِهِ عَلَى أَنْفِهِ ـ وَالْيَدَيْنِ، وَالرُّكْبَتَيْنِ وَأَطْرَافِ الْقَدَمَيْنِ، وَلاَ نَكْفِتَ الثِّيَابَ وَالشَّعَرَ " .
The Prophet (ﷺ) said, "I have been ordered to prostrate on seven bones i.e. on the forehead along with the tip of the nose and the Prophet (ﷺ) pointed towards his nose, both hands, both knees and the toes of both feet and not to gather the clothes or the hair."