Narrated 'Aisha :

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 ﷺ يُصَلِّي، وَأَنَا رَاقِدَةٌ مُعْتَرِضَةً عَلَى فِرَاشِهِ، فَإِذَا أَرَادَ أَنْ يُوتِرَ أَيْقَظَنِي فَأَوْتَرْتُ.