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.
bayhaqi:12803Saʿīd b. ʿAbd al-ʿAzīz > Sulaymān b. Mūsá > Makḥūl

[Machine] That the Messenger of Allah ﷺ used to pray voluntary prayers at the beginning of the night, and when he closed them he would pray the Witr prayer.  

البيهقي:١٢٨٠٣وَبِإِسْنَادِهِ حَدَّثَنَا سَعِيدُ بْنُ عَبْدِ الْعَزِيزِ عَنْ سُلَيْمَانَ بْنِ مُوسَى عَنْ مَكْحُولٍ

أَنَّ رَسُولَ اللهِ ﷺ نَفَّلَ فِي مَبْدَئِهِ الرُّبُعَ فَلَمَّا قَفَلَ نَفَّلَ الثُّلُثَ