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.

Source materials are from the University of Southern California MSA site
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