Hadith 1093
Chapter 40: On how many (parts of the body) does one prostrate on? - كتاب التطبيق
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا حَمَّادٌ، عَنْ عَمْرٍو، عَنْ طَاوُسٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ أُمِرَ النَّبِيُّ صلى الله عليه وسلم أَنْ يَسْجُدَ عَلَى سَبْعَةِ أَعْضَاءٍ وَلاَ يَكُفَّ شَعْرَهُ وَلاَ ثِيَابَهُ .
It was narrated that Ibn 'Abbas said:
"The Prophet (ﷺ) was commanded to prostrate on seven parts of his body and not to tuck up his hair or his garment."
Reference : Sunan an-Nasa'i 1093
In-book reference : Book 12, Hadith 65