Mishkat al-Masabih
Mishkat al-Masabih 1258
The Witr - Section 1
Arabic hadith text
وَعَنِ ابْنِ عُمَرَ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «اجْعَلُوا آخِرَ صَلَاتِكُمْ بِاللَّيْلِ وترا» . رَوَاهُ مُسلم
Translation
Ibn ‘Umar reported the Prophet as saying, "Make the last of your prayer at night a witr.” Muslim transmitted it.