ذِكْرُ الْإِبَاحَةِ لِلْمَرْءِ أَنْ يَقْرَأَ فِي صَلَاةِ الْغَدَاةِ مَا ذَكَرْنَا مِنَ السُّوَرِ
I said the dawn prayer behind the Apostle of ﷺ and heard him reciting: 'Nay. I call to witness the stars, running their courses and setting" (al-Qur'an, lxxxi. 15-16) and Done of us bent his back till he completed prostration. (Using translation from Muslim 475)
«صَلَّيْتُ خَلْفَ النَّبِيِّ ﷺ الْفَجْرَ فَسَمِعْتُهُ يَقْرَأُ {فَلَا أُقْسِمُ بِالْخُنَّسِ} الْجِوَارِ الْكُنَّسِ وَكَانَ لَا يَحْنِي رَجُلٌ مِنَّا ظَهْرَهُ حَتَّى يَسْتَتِمَّ سَاجِدًا»