Prayer at Night - Section 1 Mishkat al-Masabih 1189
Arabic hadith text
وَعَنْهَا قَالَتْ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا صَلَّى رَكْعَتَيِ الْفَجْرِ فَإِنْ كُنْتُ مستيقظة حَدثنِي وَإِلَّا اضْطجع. رَوَاهُ مُسلم
Translation
She said, “When the Prophet prayed the two rak'as of the dawn prayer, he would talk to me if I was awake, otherwise he would lie down.” Muslim transmitted it.