Volume 2, Book 16, Number 105:
Narrated Ibn Umar:
Once a person asked Allah’s Apostle about the night prayer. Allah’s Apostle replied, “The night
prayer is offered as two Rakat followed by two Rakat and so on and if anyone is afraid of the ap –
proaching dawn (Fajr prayer) he should pray one Raka and this will be a Witr for all the Rakat
which he has prayed before.” Nafi’ told that ‘Abdullah bin ‘Umar used to say Taslim between (the
first) two Rakat and (the third) odd one in the Witr prayer, when he wanted to attend to a certain
matter (during that interval between the Rakat).