Abu Ayyub reported God’s Messenger as saying, “The witr is a duty for every Muslim, so if anyone wishes to observe it with five rak'as he may do so; if anyone wishes to observe it with three he may do so; and if anyone wishes to observe it with one he may do so.”
Kharija b. Hudhafa told of God’s Messenger coming out to them and saying, “God has given you an extra prayer which is better for you than the high-bred camels,* the witr, which God has appointed for you between the evening prayer and the daybreak.”
* Literally “the red ones of the camels.” These were considered to be the best quality.
‘Abdallah b. Abu Qais said he asked ‘A’isha how many rak'as God’s Messenger prayed when observing a witr and she replied, “He used to observe a witr with four and three, six and three, eight and three, and ten and three, never observing one with less than seven or more than thirteen.”