Sahih Bukhari
Sahih Bukhari Volume 002, Book 016, Hadith Number 114.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 16. Witr Prayer
Narated By Ibn 'Umar : The Prophet used to offer (Nawafil) prayers on his Rahila (mount) facing its direction by signals, but not the compulsory prayer. He also used to pray Witr on his (mount) Rahila.