Sunan Abi Dawud Book 5, Hadith 110

The Messenger of Allah (ﷺ) used to pray thirteen rak'ahs, observing six rak'ahs in pairs including the two rak'ahs of dawn prayer. He would observe witr and five rak'ahs. He sat only in the last of them.

Previous Hadith

He (the Prophet) got up and prayed eight rak'ahs in pairs, and then observed witr with five rak'ahs and he did not sit between them.

Sunan Abi Dawud Book 5, Hadith 109
Next Hadith

The Prophet (ﷺ) used to pray thirteen rak'ahs during the night including the two rak'ahs of the dawn prayer.

Sunan Abi Dawud Book 5, Hadith 111