English translation
1711. Duwaid bin Nâfi' said: "Tbn Shihâb informed me, saying: 'Aṭâ' bin Yazîd narrated to me from Abû Ayyûb: That the Prophet ﷺ said: 'Witr is a duty, and whoever wants to pray Witr with seven (Rak'ahs), let him do so; whoever wants to pray Witr with five, let him do so; whoever wants to pray Witr with three, let him do so; and whoever wants to pray Witr with one, let him do so.” (Šahîh)
