حَدَّثَنَا عَبْدُ الصَّمَدِ حَدَّثَنَا هَارُونُ الْأَهْوَازِيُّ حَدَّثَنَا مُحَمَّدُ بْنُ سِيرِينَ عَنِ ابْنِ عُمَرَ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ صَلَاةُ الْمَغْرِبِ وِتْرُ صَلَاةِ النَّهَارِ فَأَوْتِرُوا صَلَاةَ اللَّيْلِ وَصَلَاةُ اللَّيْلِ مَثْنَى مَثْنَى وَالْوَتْرُ رَكْعَةٌ مِنْ آخِرِ اللَّيْلِ
مسند امام احمد بن حنبل · Hadith 5549
It was narrated from Ibn 'Umar that the Prophet said: "Maghrib prayer makes the prayers of the day odd-numbered so make the prayers of the night odd-numbered (by praying Witr). The night prayers are two (rak'ahs) by two, and Witr is one rak'ah at the end of the night."
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020
Sanad
حَدَّثَنَا عَبْدُ الصَّمَدِ حَدَّثَنَا هَارُونُ الْأَهْوَازِيُّ حَدَّثَنَا مُحَمَّدُ بْنُ سِيرِينَ عَنِ ابْنِ عُمَرَ