"Ata' bin Yazid narrated to me that he heard Abu Ayyub Al-Ansari say: 'Witr is a duty, so whoever wants to pray witr with five rak'ahs 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.'"
Reference: Sunan an-Nasa'i 1712 In-book : Book 20, Hadith 115 English translation : Vol. 2, Book 20, Hadith 1713
Help us gift a modern, ad-free Islamic application for the Muslim Ummah. Your donation will be recorded as Sadaqah Jariyah in your book of deeds, In Sha Allah.