Sunan Abi Dawud Book 5, Hadith 90
The Messenger of Allah (ﷺ) used to pray thirteen rak'ahs during the night ; he then offered two light rak'ahs of prayer when he heard the call to the dawn prayer.
The Messenger of Allah (ﷺ) used to pray thirteen rak'ahs during the night, observing a witr out of that with five, he did not sit during the five except the last and then gave the salutation.
Abu Dawud said: Ibn Numair reported it from Hisham recently.
The Prophet (ﷺ) used to pray thirteen rak'ahs during the night. He would offer eight rak'ahs observing the witr with one rak'ah. Then he prayed (the narrator Muslim said) two rak'ahs after witr prayer in sitting position. When he wished to bow, he stood up and bowed. He used to pray two rak'ahs between the call to the dawn prayer and the iqamah.