Chapter: Night prayers and the number of rak`ah offered by the Prophet (saws) at night, and that Witr is one rak`ah, and a one-rak`ah prayer is correct
A'isha observed that the Messenger of Allah ( صلی اللہ علیہ وسلم ) used to observe prayer in the night and the last of his (night) prayer was Witr.
Authentic