(20) باب صَلاَةُ اللَّيْلِ مَثْنَى مَثْنَى وَالْوِتْرُ رَكْعَةٌ مِنْ آخِرِ اللَّيْلِ
Ibn 'Umar reported the Messenger of Allah (ﷺ) as say- ing:
Hasten to pray Witr before morning. (ID)
Reference (ID): Sahih Muslim 750 (ID)
In-book reference (ID): Book 6, Hadith 182 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1637 (ID)