Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
bayhaqi:4465 – Abū ʿAbdullāh al-Ḥāfiẓ And ʾAbū Saʿīd b. Abū ʿAmr > Abū al-ʿAbbās Muḥammad b. Yaʿqūb > Muḥammad b. Isḥāq al-Ṣaghānī > Saʿīd b. ʿĀmir > Shuʿbah > ʿAbdullāh b. Abū al-Safar > al-Shaʿbī

[Machine] Al-Witr is a voluntary act of worship and it is one of the noblest acts of voluntary worship.  

البيهقي:٤٤٦٥ – أنبأ أَبُو عَبْدِ اللهِ الْحَافِظُ وَأَبُو سَعِيدِ بْنُ أَبِي عَمْرٍو قَالَا ثنا أَبُو الْعَبَّاسِ مُحَمَّدُ بْنُ يَعْقُوبَ ثنا مُحَمَّدُ بْنُ إِسْحَاقَ الصَّغَانِيُّ ثنا سَعِيدُ بْنُ عَامِرٍ عَنْ شُعْبَةَ عَنْ عَبْدِ اللهِ بْنِ أَبِي السَّفَرِ عَنِ الشَّعْبِيِّ قَالَ

الْوِتْرُ تَطَوُّعٌ وَهُوَ مِنْ أَشْرَفِ التَّطَوُّعِ