I stayed overnight in the house of my aunt Maimuna. Messenger of Allah ﷺ talked with his wife for a while and then went to bed. When it was the last third of the night, he got up and looked towards the sky and said: "Verily! In the creation of the Heavens and the Earth and in the alteration of night and day, there are indeed signs for men of understanding." (3.190) Then he stood up, performed ablution, brushed his teeth with a Siwak, and then prayed eleven rakʿat. Then Bilal pronounced the Adhan (i.e. call for the Fajr prayer). The Prophet ﷺ then offered two rakʿat (Sunna) prayer and went out (to the Mosque) and offered the (compulsory congregational) Fajr prayer.  

بِتُّ عِنْدَ خَالَتِي مَيْمُونَةَ فَتَحَدَّثَ رَسُولُ اللَّهِ ﷺ مَعَ أَهْلِهِ سَاعَةً ثُمَّ رَقَدَ فَلَمَّا كَانَ ثُلُثُ اللَّيْلِ الآخِرُ قَعَدَ فَنَظَرَ إِلَى السَّمَاءِ فَقَالَ {إِنَّ فِي خَلْقِ السَّمَوَاتِ وَالأَرْضِ وَاخْتِلاَفِ اللَّيْلِ وَالنَّهَارِ لآيَاتٍ لأُولِي الأَلْبَابِ} ثُمَّ قَامَ فَتَوَضَّأَ وَاسْتَنَّ فَصَلَّى إِحْدَى عَشْرَةَ رَكْعَةً ثُمَّ أَذَّنَ بِلاَلٌ فَصَلَّى رَكْعَتَيْنِ ثُمَّ خَرَجَ فَصَلَّى الصُّبْحَ  

[Machine] I slept in the house of my aunt Maymuna, the wife of the Prophet ﷺ. The Prophet ﷺ was there. I observed how the Prophet ﷺ prayed at night. Then the Prophet ﷺ spoke to his family for a while and then went to sleep. When it was the last third or half of the night, he got up and looked at the sky and recited, "Indeed, in the creation of the heavens and the earth and the alternation of the night and the day are signs for those of understanding" until he finished reciting these verses. Then he got up, performed ablution, brushed his teeth, and prayed eleven units of prayer. Then Bilal called the prayer for Fajr and he prayed two units of prayer. Then he left and prayed in congregation with the people for Fajr.  

رَقَدْتُ فِي بَيْتِ خَالَتِي مَيْمُونَةَ زَوْجِ النَّبِيِّ ﷺ وَكَانَ النَّبِيُّ ﷺ عِنْدَهَا لَأَنْظُرَ كَيْفَ صَلَاةُ النَّبِيِّ ﷺ مِنَ اللَّيْلِ فَحَدَّثَ النَّبِيُّ ﷺ أَهْلَهُ سَاعَةً ثُمَّ رَقَدَ فَلَمَّا كَانَ ثُلُثُ اللَّيْلِ الْآخِرُ أَوْ نِصْفُهُ قَامَ فَنَظَرَ إِلَى السَّمَاءِ فَقَرَأَ {إِنَّ فِي خَلَقِ السَّماَوَاتِ وَالْأَرْضِ وَاخْتِلَافِ اللَّيْلِ وَالنَّهَارِ لَآيَاتٍ لِأُولِي الْأَلْبَابِ} حَتَّى قَرَأَ هَذِهِ الْآيَاتِ ثُمَّ قَامَ فَتَوَضَّأَ وَاسْتَنَّ ثُمَّ صَلَّى إِحْدَى عَشْرَةَ رَكْعَةً ثُمَّ أَذَّنَ بِلَالٌ بِالصَّلَاةِ فَصَلَّى رَكْعَتَيْنِ ثُمَّ خَرَجَ فَصَلَّى بِالنَّاسِ الصُّبْحَ