(35) باب كَيْفَ الْوِتْرُ بِوَاحِدَةٍ
It was narrated from 'Aishah that:
The Prophet (ﷺ) used to pray eleven rak'ahs at night, ending them with one rak'ah of witr, then he would lie down on his right side.
Reference: Sunan an-Nasa'i 1696
In-book reference: Book 20, Hadith 99
English translation: Vol. 2, Book 20, Hadith 1697