Prayer at Night - Section 1 Mishkat al-Masabih 1191
Arabic hadith text
وَعَنْهَا قَالَتْ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُصَلِّي مِنَ اللَّيْلِ ثَلَاثَ عَشْرَةَ رَكْعَةً مِنْهَا الْوتر وركعتا الْفجْر. رَوَاهُ مُسلم
Translation
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.