Sunan an-Nasa'i 686
سنن النسائي#686SahihIt was narrated from Makhramah bin Sulaiman that Kuraib - the freed slave of Ibn 'Abbas - told him:"I asked Ibn 'Abbas: 'How did the Messenger of Allah (S.A.W) pray at night?' He said: 'He prayed eleven Rak'ahs including Witr, then he slept deeply until I could hear him snoring, then Bilal came to him and said: "The prayer, O Messenger of Allah!" Then he got up and prayed two brief Rak'ahs then led the people in prayer, and he did not perform Wudu
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 7:61