How many rak'ahs did Prophet Muhammad (peace be upon him) observe in his night prayer?
 It is reported on the authority of 'A'isha that the prayer of Allah's Messenger (may peace be upon him) in the night consisted of ten rak'ahs. He observed a Witr and two rak'ahs (of Sunan) of the dawn prayer, and thus the total comes to thirteen rak'ahs.