Sahih Muslim 1097
صحيح مسلم#1097Sahihحَدَّثَنَا عَمْرٌو النَّاقِدُ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنِ ابْنِ طَاوُسٍ، عَنْ أَبِيهِ، عَنِ ابْنِ عَبَّاسٍ، أُمِرَ النَّبِيُّ صلى الله عليه وسلم أَنْ يَسْجُدَ عَلَى سَبْعٍ وَنُهِيَ أَنْ يَكْفِتَ الشَّعْرَ وَالثِّيَابَ " .
Ibn 'Abbas reported:The Messenger of Allah (ﷺ) had been commanded to prostrate on seven (bones) and forbidden to fold back hair and clothing
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 4:259