Sahih Muslim 1735
The Book of Prayer - Travellers
وَحَدَّثَنِي هَارُونُ بْنُ سَعِيدٍ الأَيْلِيُّ، حَدَّثَنَا ابْنُ وَهْبٍ، أَخْبَرَنِي سُلَيْمَانُ بْنُ بِلاَلٍ، عَنْ رَبِيعَةَ بْنِ أَبِي عَبْدِ الرَّحْمَنِ، عَنِ الْقَاسِمِ بْنِ مُحَمَّدٍ، عَنْ عَائِشَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يُصَلِّي صَلاَتَهُ بِاللَّيْلِ وَهِيَ مُعْتَرِضَةٌ بَيْنَ يَدَيْهِ فَإِذَا بَقِيَ الْوِتْرُ أَيْقَظَهَا فَأَوْتَرَتْ .
A'isha reported that the Messenger of Allah (ﷺ) used to offer prayer at night while she lay in front of him, and when the Witr prayer was yet to be observed, he would awaken her and she observed Witr
Text from the public-domain hadith-api dataset. Numbering follows that dataset and can differ by a few from some printed editions — check the wording, not only the number.