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).
Reference: Sahih Muslim 736 a In-book : Book 6, Hadith 147 USC-MSA web (English) : Book 4, Hadith 1602 (deprecated)
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