One night the Prophet ﷺ was unable to sleep and said, "Would that a righteous man from my companions guarded me tonight." Suddenly we heard the clatter of arms, whereupon the Prophet ﷺ said, "Who is it?" It was said, "I am Saʿd, O Messenger of Allah ﷺ! I have come to guard you." The Prophet ﷺ then slept so soundly that we heard him snoring. Abu ʿAbdullah said: ʿAisha said: Bilal said, "Would that I but stayed overnight in a valley with Idhkhir and Jalil (two kinds of grass) around me (i.e., in Mecca)." Then I told that to the Prophet ﷺ .
عَائِشَةُ أَرِقَ النَّبِيُّ ﷺ ذَاتَ لَيْلَةٍ فَقَالَ لَيْتَ رَجُلاً صَالِحًا مِنْ أَصْحَابِي يَحْرُسُنِي اللَّيْلَةَ إِذْ سَمِعْنَا صَوْتَ السِّلاَحِ قَالَ مَنْ هَذَا قِيلَ سَعْدٌ يَا رَسُولَ اللَّهِ جِئْتُ أَحْرُسُكَ فَنَامَ النَّبِيُّ ﷺ حَتَّى سَمِعْنَا غَطِيطَهُ قَالَ أَبُو عَبْدِ اللَّهِ وَقَالَتْ عَائِشَةُ قَالَ بِلاَلٌ أَلاَ لَيْتَ شِعْرِي هَلْ أَبِيتَنَّ لَيْلَةً بِوَادٍ وَحَوْلِي إِذْخِرٌ وَجَلِيلُ فَأَخْبَرْتُ النَّبِيَّ ﷺ