The Book of Prayers (Kitab Al-Salat) 
Muslim :: Book 4 : Hadith 1638
Ibn 'Umar said: He who prayed at night should make Witr the end of his prayer, for the Messenger of Allah (way peace be upon him) ordered this.
The Book of Prayers (Kitab Al-Salat)
Muslim :: Book 4 : Hadith 1638
Ibn 'Umar said: He who prayed at night should make Witr the end of his prayer, for the Messenger of Allah (way peace be upon him) ordered this.