(Imām Bukhārī narrates): Mūsā ibn Ismā'īl narrated to us, he said: Abū 'Awānah narrated to us, from 'Amr, from Tāwūs, from Ibn 'Abbās, may Allāh be pleased with them both, from the Prophet ﷺ, he said:
I have been commanded that I should perform sajdah upon seven limbs, and neither fold up the hair nor the garment.
حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، قَالَ حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ عَمْرٍو، عَنْ طَاوُسٍ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " أُمِرْتُ أَنْ أَسْجُدَ عَلَى سَبْعَةٍ، لاَ أَكُفُّ شَعَرًا وَلاَ ثَوْبًا ".
Reference: Sahih Al Bukhari 816