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.
muslim:745a[Chain 1] Yaḥyá b. Yaḥyá > Sufyān b. ʿUyaynah > Abū Yaʿfūr Wāsmuh Wāqid And Laqabuh Waqdān [Chain 2] Abū Bakr b. Abū Shaybah w Abū Kurayb > Abū Muʿāwiyah > al-Aʿmash > Muslim > Masrūq > ʿĀʾishah

The Messenger of Allah ﷺ observed the Witr prayer every night and he completed Witr at the time of dawn.  

مسلم:٧٤٥aوَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى أَخْبَرَنَا سُفْيَانُ بْنُ عُيَيْنَةَ

عَنْ أَبِي يَعْفُورٍ وَاسْمُهُ وَاقِدٌ وَلَقَبُهُ وَقْدَانُ ح وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ وَ أَبُو كُرَيْبٍ قَالاَ حَدَّثَنَا أَبُو مُعَاوِيَةَ عَنِ الأَعْمَشِ كِلاَهُمَا عَنْ مُسْلِمٍ عَنْ مَسْرُوقٍ عَنْ عَائِشَةَ قَالَتْ مِنْ كُلِّ اللَّيْلِ قَدْ أَوْتَرَ رَسُولُ اللَّهِ ﷺ فَانْتَهَى وِتْرُهُ إِلَى السَّحَرِ