حَدَّثَنَا أَحْمَدُ بْنُ يُونُسَ، حَدَّثَنَا زُهَيْرٌ، حَدَّثَنَا هِشَامُ بْنُ عُرْوَةَ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَيُصَلِّي صَلاَتَهُ مِنَ اللَّيْلِ وَهِيَ مُعْتَرِضَةٌ بَيْنَهُ وَبَيْنَ الْقِبْلَةِ رَاقِدَةً عَلَى الْفِرَاشِ الَّذِي يَرْقُدُ عَلَيْهِ حَتَّى إِذَا أَرَادَ أَنْ يُوتِرَ أَيْقَظَهَا فَأَوْتَرَتْ ‏.‏
Translation
‘Urwah reported on the authority of ‘A’ishah

The Messenger of Allah (ﷺ) used to pray his prayer at night while she was lying across between him and the qiblah, sleeping on the bed upon which he would sleep, until when he wanted to perform witr, he would wake her up and she would perform witr.