The Messenger of Allah ﷺ used to pray ten rak'ahs during the night, and would observe the witr with one rak'ah, he then prayed two rak'ahs of the dawn prayer. Thus he prayed thirteen rak'ahs in all.
كَانَ رَسُولُ اللَّهِ ﷺ يُصَلِّي مِنَ اللَّيْلِ عَشْرَ رَكَعَاتٍ وَيُوتِرُ بِسَجْدَةٍ وَيَسْجُدُ سَجْدَتَىِ الْفَجْرِ فَذَلِكَ ثَلاَثَ عَشْرَةَ رَكْعَةً
The Prophet ﷺ used to offer thirteen rakʿat of the night prayer and that included the witr and two rakʿat (Sunna) of the Fajr prayer.
كَانَ النَّبِيُّ ﷺ يُصَلِّي مِنَ اللَّيْلِ ثَلاَثَ عَشْرَةَ رَكْعَةً مِنْهَا الْوِتْرُ وَرَكْعَتَا الْفَجْرِ
It is reported on the authority of 'A'isha that the prayer of Messenger of Allah ﷺ in the night consisted of ten rak'ahs. He observed a Witr and two rak'ahs (of Sunan) of the dawn prayer, and thus the total comes to thirteen rak'ahs.
سَمِعْتُ عَائِشَةَ تَقُولُ كَانَتْ صَلاَةُ رَسُولِ اللَّهِ ﷺ مِنَ اللَّيْلِ عَشَرَ رَكَعَاتٍ وَيُوتِرُ بِسَجْدَةٍ وَيَرْكَعُ رَكْعَتَىِ الْفَجْرِ فَتِلْكَ ثَلاَثَ عَشْرَةَ رَكْعَةً
It is reported on the authority of 'A'isha that the prayer of Messenger of Allah ﷺ in the night consisted of ten rak'ahs. He observed a Witr and two rak'ahs (of Sunan) of the dawn prayer, and thus the total comes to thirteen rak'ahs. (Using translation from Muslim 738e)
سَمِعْتُ عَائِشَةَ تَقُولُ كَانَتْ صَلَاةُ رَسُولِ اللهِ ﷺ مِنَ اللَّيْلِ عَشْرَ رَكَعَاتٍ يُوتِرُ بِسَجْدَةٍ وَيَرْكَعُ رَكْعَتَيِ الْفَجْرِ فَتِلْكَ ثَلَاثَعَشْرَةَ
[Machine] The Messenger of Allah ﷺ used to pray thirteen rak'ahs at night, eight rak'ahs and then three rak'ahs of witr, and he would pray two rak'ahs for Fajr.
كَانَ رَسُولُ اللهِ ﷺ «يُصَلِّي مِنَ اللَّيْلِ ثَلَاثَ عَشْرَةَ رَكْعَةً ثَمَانِ رَكَعَاتٍ وَيُوتِرُ بِثَلَاثٍ وَيَرْكَعُ رَكْعَتَيِ الْفَجْرِ»
The Prophet ﷺ used to offer thirteen rakʿat of the night prayer and that included the witr and two rakʿat (Sunna) of the Fajr prayer. (Using translation from Bukhārī 1140)
كَانَ رَسُولُ اللهِ ﷺ «يُصَلِّي مِنَ اللَّيْلِ ثَلَاثَ عَشْرَةَ رَكْعَةً ثَمَانِيَ رَكَعَاتٍ وَيُوتِرُ بِثَلَاثٍ وَيَرْكَعُ رَكْعَتَيِ الْفَجْرِ»
[Machine] The Messenger of Allah ﷺ used to pray ten Rak'ahs at night and he would perform Witr with a prostration, and he would perform two prostrations for Fajr, so that makes thirteen Rak'ahs.
كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي مِنَ اللَّيْلِ عَشْرَ رَكَعَاتٍ وَيُوتِرُ بِسَجْدَةٍ وَيَسْجُدُ سَجْدَتَيْنِ لِلْفَجْرِ فَتِلْكَ ثَلَاثَ عَشْرَةَ رَكْعَةً