أَخْبَرَنَا مُحَمَّدُ بْنُ مَنْصُورٍ الْمَكِّيُّ، عَنْ سُفْيَانَ، عَنْ عَمْرٍو، عَنْ طَاوُسٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ أُمِرَ النَّبِيُّ صلى الله عليه وسلم أَنْ يَسْجُدَ عَلَى سَبْعَةِ أَعْظُمٍ وَنُهِيَ أَنْ يَكُفَّ الشَّعْرَ وَالثِّيَابَ .
It was narrated that Ibn 'Abbas said: "The Prophet (PBUH) was commanded to prostrate on seven bones and was forbidden to tuck up his hair and garment." Translation Not Available
Book Ref: Sunan An Nisai Book 12 Hadith 1115
Web Ref: Sunan An Nisai Vol 2 Book 12 Hadith 1116