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
Abu Salama is reported to have said. I came to 'A'isha. I said: O mother, inform me about the prayer of the Messenger of Allah ( صلی اللہ علیہ وسلم ). She said: His (night prayer) in Ramadan and (during other months) was thirteen rak'ahs at night including two rak'ahs of fajr.
Authentic