Were there a pious person from amongst my companions who should keep a watch for me during the nightt? She said: We heard the noise of arms, whereupon Messenger of Allah ﷺ said: Who is it? And Sa'd b. Abi Waqqas said: Allah's MesseDger. I have come to serve as your sentinel. 'A'isha said: Allah' s Messenger ﷺ slept (such a sound sleep) that I heard the noise of his snoring. (Using translation from Muslim 2410a)
أَرِقَ رَسُولُ اللَّهِ ﷺ ذَاتَ لَيْلَةٍ فَقَالَ «لَيْتَ رَجُلًا يَحْرُسُنِي مِنْ أَصْحَابِي اللَّيْلَةَ» قَالَتْ فَسَمِعْنَا صَوْتَ السِّلَاحِ فَقَالَ رَسُولُ اللَّهِ ﷺ «مَنْ هَذَا؟» فَقَالَ سَعْدُ بْنُ أَبِي وَقَّاصٍ أَنَا يَا رَسُولَ اللَّهِ جِئْتُ أَحْرُسُكَ قَالَتْ عَائِشَةُ فَنَامَ رَسُولُ اللَّهِ ﷺ حَتَّى سَمِعْتُ غَطِيطَهُ