Sunnan Abu Dawud Collection :: Book Number 5
5.1360
Narrated Abdullah ibn Abbas: I spent a night with my maternal aunt Maymunah. The Prophet (peace_be_upon_him) got up to pray at night. He prayed thirteen rak'ahs including two rak'ahs of the dawn prayer. I guessed that he stood in every rak'ah as long as one could recite Surah al-Muzzammil (73).