Prayer at Night (Tahajjud) 
Bukhari :: Book 2 :: Volume 21 :: Hadith 241
Narrated 'Aisha,
The Prophet (p.b.u.h) used to offer thirteen Rakat of the night prayer and that included the Witr and two Rakat (Sunna) of the Fajr prayer.
Prayer at Night (Tahajjud)
Bukhari :: Book 2 :: Volume 21 :: Hadith 241
Narrated 'Aisha,
The Prophet (p.b.u.h) used to offer thirteen Rakat of the night prayer and that included the Witr and two Rakat (Sunna) of the Fajr prayer.