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كتاب الوتر
14  
Witr Prayer
(3)
Chapter: The Prophet (pbuh) used to wake his family up for the Witr prayer
(3)
باب إِيقَاظِ النَّبِيِّ صلى الله عليه وسلم أَهْلَهُ بِالْوِتْرِ
Sahih al-Bukhari 997

Narrated `A'isha:

The Prophet (ﷺ) used to offer his night prayer while I was sleeping across in his bed. Whenever he intended to offer the witr prayer, he used to wake me up and I would offer the witr prayer too.

حَدَّثَنَا مُسَدَّدٌ، قَالَ حَدَّثَنَا يَحْيَى، قَالَ حَدَّثَنَا هِشَامٌ، قَالَ حَدَّثَنِي أَبِي، عَنْ عَائِشَةَ، قَالَتْ كَانَ النَّبِيُّ صلى الله عليه وسلم يُصَلِّي، وَأَنَا رَاقِدَةٌ مُعْتَرِضَةً عَلَى فِرَاشِهِ، فَإِذَا أَرَادَ أَنْ يُوتِرَ أَيْقَظَنِي فَأَوْتَرْتُ‏.‏
Reference : Sahih al-Bukhari 997
In-book reference : Book 14, Hadith 8
USC-MSA web (English) reference : Vol. 2, Book 16, Hadith 111
  (deprecated numbering scheme)