(20) باب صَلاَةُ اللَّيْلِ مَثْنَى مَثْنَى وَالْوِتْرُ رَكْعَةٌ مِنْ آخِرِ اللَّيْلِ
Nafi' reported Ibn 'Umar as saying:
He who observed the night prayer should make Witr the end of his prayer before dawn. The Messenger of Allah (ﷺ) used to order them thus. (ES)
Reference (ES): Sahih Muslim 751 c (ES)
In-book reference (ES): Book 6, Hadith 185 (ES)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1640 (ES)