The Prophet ﷺ used to pray eleven rakʿat in the late part of the night, and when dawn appeared, he would offer two rakʿat and then lie on his right side till the Muadhdhin came to inform him (that the morning prayer was due).  

عَنْ عَائِشَةَ ؓ كَانَ النَّبِيُّ ﷺ يُصَلِّي مِنَ اللَّيْلِ إِحْدَى عَشْرَةَ رَكْعَةً فَإِذَا طَلَعَ الْفَجْرُ صَلَّى رَكْعَتَيْنِ خَفِيفَتَيْنِ ثُمَّ اضْطَجَعَ عَلَى شِقِّهِ الأَيْمَنِ حَتَّى يَجِيءَ الْمُؤَذِّنُ فَيُؤْذِنَهُ  

'A'isha reported that the Messenger of Allah ﷺ used to pray eleven rak'ahs at night, observing the Witr with a single rak'ah, and when he had finished them, he lay down on his right side, till the Mu'adhdhin came to him and he (the Holy Prophet) then observed two short rak'ahs (of Sunan of the dawn prayer).  

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يُصَلِّي بِاللَّيْلِ إِحْدَى عَشْرَةَ رَكْعَةً يُوتِرُ مِنْهَا بِوَاحِدَةٍ فَإِذَا فَرَغَ مِنْهَا اضْطَجَعَ عَلَى شِقِّهِ الأَيْمَنِ حَتَّى يَأْتِيَهُ الْمُؤَذِّنُ فَيُصَلِّي رَكْعَتَيْنِ خَفِيفَتَيْنِ  

[Machine] When the Mu'adhin finished calling the Adhan, the Messenger of Allah ﷺ used to pray two brief Rak'ahs, then lay down on his right side until the Mu'adhin came to inform him to start the prayer.  

كَانَ رَسُولُ اللهِ ﷺ إِذَا ثَوَّبَ الْمُؤَذِّنُ صَلَّىرَكْعَتَيْنِ خَفِيفَتَيْنِ ثُمَّ اضْطَجَعَ عَلَى شِقِّهِ الْأَيْمَنِ حَتَّى يَأْتِيَهُ الْمُؤَذِّنُ فَيُؤْذِنَهُ بِالصَّلَاةِ  

[Machine] The Messenger of Allah ﷺ used to pray eleven units of prayer during the night. When the dawn came, he would pray two quick units of prayer, then lie down on his right side until the Mu'adhin calls him for prayer.  

كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي مِنَ اللَّيْلِ إِحْدَى عَشْرَةَ رَكْعَةً فَإِذَا فَجَرَ الْفَجْرُ صَلَّى رَكْعَتَيْنِ خَفِيفَتَيْنِ ثُمَّ اتَّكَأَ عَلَىشِقِّهِ الْأَيْمَنِ حَتَّى يَأْتِيَهُ الْمُؤَذِّنُ يُؤْذِنُهُ لِلصَّلَاةِ  

[Machine] The Prophet ﷺ used to pray from the evening (Isha) prayer until the dawn (Fajr) prayer eleven voluntary units (raka'at), and he would conclude every two units with the Tasleem (saying Assalamu Alaikum). He would perform the Witr prayer with one unit. When the Mu'athin finished the Adhan, he would perform two light units (raka'at), then lie down until the Mu'athin comes to him and he would go out with him.  

كَانَ النَّبِيُّ ﷺ «يُصَلِّي مَا بَيْنَ الْعِشَاءِ إِلَى الْفَجْرِ إِحْدَى عَشْرَةَ رَكْعَةً يُسَلِّمُ فِي كُلِّ رَكْعَتَيْنِ يُوتِرُ بِوَاحِدَةٍ فَإِذَا سَكَتَ الْمُؤَذِّنُ مِنَ الْأَذَانِ رَكَعَ رَكْعَتَيْنِ خَفِيفَتَيْنِ ثُمَّ اضْطَجَعَ حَتَّى يَأْتِيَهُ الْمُؤَذِّنُ فَيَخْرُجُ مَعَهُ»  

'A'isha reported that the Messenger of Allah ﷺ used to pray eleven rak'ahs at night, observing the Witr with a single rak'ah, and when he had finished them, he lay down on his right side, till the Mu'adhdhin came to him and he (the Holy Prophet) then observed two short rak'ahs (of Sunan of the dawn prayer). (Using translation from Muslim 736a)   

أَنَّ رَسُولَ اللهِ ﷺ كَانَ يُصَلِّي بِاللَّيْلِ إِحْدَى عَشْرَةَ رَكْعَةً يُوتِرُ مِنْهَا بِوَاحِدَةٍ فَإِذَا فَرَغَ مِنْهَا اضْطَجَعَ عَلَى شِقِّهِ الْأَيْمَنِ حَتَّى يَأْتِيَهُ الْمُؤَذِّنُ فَيُصَلِّيَ رَكْعَتَيْنِ خَفِيفَتَيْنِ