question #1 Sahih Muslim 738c, Book 6, Hadith 154 : How many rak’ahs did the Prophet Muhammad (peace be upon him) perform during his night prayer including Witr?

Abu Salama reported that he asked ‘A’isha about the prayer of the Messenger of Allah (may peace he upon him) (during the night). The rest of the hadith is the same but with this exception that he (the Holy Prophet) observed nine rak’ahs including Witr.