Sunan Abi Dawud 1338
سنن أبي داود#1338SahihNarrated 'Aishah: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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Muslim (737)
In-book reference: 5:89