1122An NasaiSahih (Darussalam)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 (ﷺ) was commanded to prostrate on seven bones and was forbidden to tuck up his hair and garment."Reference: Sunan an-Nasa'i 1115 In-book : Book 12, Hadith 87 English translation : Vol. 2, Book 12, Hadith 1116