Sunan Abi Dawud, Hadith 1351 ⓘ
Narrated Ibn 'Abbas: I spent a night with my maternal aunt Maimunah. The Messenger of Allah came after the evening has come. He asked: Did the boy pray ? She said: Yes. Then he lay down till a part of night had passed as much as Allah willed; he got up, performed ablution and prayed seven or five rak'ahs, observing witr with them. He uttered the salutation only in the last of them.
حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا وَكِيعٌ، حَدَّثَنَا مُحَمَّدُ بْنُ قَيْسٍ الأَسَدِيُّ، عَنِ الْحَكَمِ بْنِ عُتَيْبَةَ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ : بِتُّ عِنْدَ خَالَتِي مَيْمُونَةَ فَجَاءَ رَسُولُ اللَّهِ صلى الله عليه وسلم بَعْدَ مَا أَمْسَى فَقَالَ : " أَصَلَّى الْغُلاَمُ " . قَالُوا : نَعَمْ . فَاضْطَجَعَ حَتَّى إِذَا مَضَى مِنَ اللَّيْلِ مَا شَاءَ اللَّهُ قَامَ فَتَوَضَّأَ، ثُمَّ صَلَّى سَبْعًا أَوْ خَمْسًا أَوْتَرَ بِهِنَّ لَمْ يُسَلِّمْ إِلاَّ فِي آخِرِهِنَّ .
also referenced under: Hadith 1356 (DarusSalam) & Book 5, Hadith 1351 (USC-MSA)