حَدَّثَنَا يَحْيَى عَنْ عُبَيْدِ اللَّهِ حَدَّثَنِي نَافِعٌ عَنِ ابْنِ عُمَرَ عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ اجْعَلُوا آخِرَ صَلَاتِكُمْ بِاللَّيْلِ وِتْرًا
مسند امام احمد بن حنبل · Hadith 4710
It was narrated from Ibn 'Umar that the Prophet (PBUH) said: "Make the last of your prayers at night Witr."
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020