Muwatta
Malik
موطأ مالك
07
Tahajjud
كتاب صلاة الليل
Chapter 2: How the Prophet, may Allah bless him and grant him peace, Prayed the Witr
Muwatta Malik 267
Yahya related to me from Malik from Hisham ibn Urwa from his father that A'isha, umm al-muminin said, "The Messenger of Allah ﷺ used to pray thirteen Rak'ahs in the night and then would pray two Rak'ahs when he heard the adhan for the subh prayer."
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ أُمِّ الْمُؤْمِنِينَ، قَالَتْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُصَلِّي بِاللَّيْلِ ثَلاَثَ عَشْرَةَ رَكْعَةً ثُمَّ يُصَلِّي إِذَا سَمِعَ النِّدَاءَ بِالصُّبْحِ رَكْعَتَيْنِ خَفِيفَتَيْنِ .