The Messenger of Allah ﷺ said: "I have been commanded to prostrate on seven and not to tuck up my hair or garment."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ أُمِرْتُ أَنْ أَسْجُدَ عَلَى سَبْعَةٍ وَلاَ أَكُفَّ شَعْرًا وَلاَ ثَوْبًا