Sahih Muslim Book - 4, Hadith - 1098

حَدَّثَنَا مُحَمَّدُ بْنُ حَاتِمٍ حَدَّثَنَا بَهْزٌ حَدَّثَنَا وُهَيْبٌ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ طَاوُسٍ عَنْ طَاوُسٍ عَنِ ابْنِ عَبَّاسٍ أَنَّ رَسُولَ اللَّهِ -صلى الله عليه وسلم- قَالَ « أُمِرْتُ أَنْ أَسْجُدَ عَلَى سَبْعَةِ أَعْظُمٍ الْجَبْهَةِ - وَأَشَارَ بِيَدِهِ عَلَى أَنْفِهِ - وَالْيَدَيْنِ وَالرِّجْلَيْنِ وَأَطْرَافِ الْقَدَمَيْنِ وَلاَ نَكْفِتَ الثِّيَابَ وَلاَ الشَّعْرَ ».

It was narrated from Ibn 'Abbas that the Messenger of Allah (s.a.w) said: "I have been commanded to prostrate on seven bones: The forehead" - and he pointed to his nose - "the hands, the feet and the ends of the feet (toes), and not to tuck up my garment or hair."