The Prophet ﷺ was ordered to prostrate on seven bony parts and not to tuck up his clothes or hair.  

أُمِرَ النَّبِيُّ ﷺ أَنْ يَسْجُدَ عَلَى سَبْعَةِ أَعْظُمٍ وَلاَ يَكُفَّ ثَوْبَهُ وَلاَ شَعَرَهُ