(4) باب لِيَجْعَلْ آخِرَ صَلاَتِهِ وِتْرًا
Narrated `Abdullah bin `Umar:
The Prophet (ﷺ) said, "Make witr as your last prayer at night." (ID)
Reference (ID): Sahih al-Bukhari 998 (ID)
In-book reference (ID): Book 14, Hadith 9 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 16, Hadith 112 (ID)