Were there a pious person from amongst my Companions who should keep a watch for me durin. the night? She (A'isha) reported: We were in this state that we heard the clanging noise of arms. lie (the Holy Prophet) said: Who is it? He said: This is Sa'd b. Abi Waqqas. Messenger of Allah ﷺ said to him: What brings you here? Thereupon he said: I harboured fear (lest any harm should come to) Messenger of Allah ﷺ, so I came to serve as your sentinel. Messenger of Allah ﷺ invoked blessings upon him. He then slept. This hadith has been transmitted on the authority of Ibn Rumh with a slight variation of wording.
سَهِرَ رَسُولُ اللَّهِ ﷺ مَقْدَمَهُ الْمَدِينَةَ لَيْلَةً فَقَالَ لَيْتَ رَجُلاً صَالِحًا مِنْ أَصْحَابِي يَحْرُسُنِي اللَّيْلَةَ قَالَتْ فَبَيْنَا نَحْنُ كَذَلِكَ سَمِعْنَا خَشْخَشَةَ سِلاَحٍ فَقَالَ مَنْ هَذَا قَالَ سَعْدُ بْنُ أَبِي وَقَّاصٍ فَقَالَ رَسُولُ اللَّهِ ﷺ مَا جَاءَ بِكَ قَالَ وَقَعَ فِي نَفْسِي خَوْفٌ عَلَى رَسُولِ اللَّهِ ﷺ فَجِئْتُ أَحْرُسُهُ فَدَعَا لَهُ رَسُولُ اللَّهِ ﷺ ثُمَّ نَامَ وَفِي رِوَايَةِ ابْنِ رُمْحٍ فَقُلْنَا مَنْ هَذَا