Abu Salama reported that he asked 'A'isha about the prayer of the Messenger of Allah (ﷺ) (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.
Reference: Sahih Muslim 738 c In-book : Book 6, Hadith 154 USC-MSA web (English) : Book 4, Hadith 1609 (deprecated)
Help us gift a modern, ad-free Islamic application for the Muslim Ummah. Your donation will be recorded as Sadaqah Jariyah in your book of deeds, In Sha Allah.