Hadith 1191

She said the Prophet used to pray thirteen rak'as during the night, including the witr and two rak'as of the dawn prayer. Muslim transmitted it.

وَعَنْهَا قَالَتْ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُصَلِّي مِنَ اللَّيْلِ ثَلَاثَ عَشْرَةَ رَكْعَةً مِنْهَا الْوتر وركعتا الْفجْر. رَوَاهُ مُسلم

Reference: 5611910
In-book reference: Book 4, Hadith 1191