"The Messenger of Allah (ﷺ) said: "O people of the Qur'an, pray witr, for Allah, the Mighty and Sublime, is Witr (One) and loves Al-Witr (the odd numbered).'"
Sunan an-Nasa'i Book 20, Hadith 78
← Previous Hadith "A man stood up and said: 'O Messenger of Allah (ﷺ), how are the prayers at night to be done?' The Messenger of Allah (ﷺ) said: 'Prayers at night are (offered) two by two, then if you fear that dawn will come, pray witr with one.'"

Sunan an-Nasa'i Book 20, Hadith 77 Next Hadith → "Witr is not essential like the obligatory prayers, but it is the sunnah of the Messenger of Allah (ﷺ)."

Sunan an-Nasa'i Book 20, Hadith 79