Sahih Bukhari Volume 9, Book 94, Hadith 7233

حَدَّثَنَا خَالِدُ بْنُ مَخْلَدٍ، حَدَّثَنَا سُلَيْمَانُ بْنُ بِلاَلٍ، حَدَّثَنِي يَحْيَى بْنُ سَعِيدٍ، سَمِعْتُ عَبْدَ اللَّهِ بْنَ عَامِرِ بْنِ رَبِيعَةَ، قَالَ قَالَتْ عَائِشَةُ أَرِقَ النَّبِيُّ صلى الله عليه وسلم 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 صلى الله عليه وسلم حَتَّى سَمِعْنَا غَطِيطَهُ‏.‏ قَالَ أَبُو عَبْدِ اللَّهِ وَقَالَتْ عَائِشَةُ قَالَ بِلاَلٌ أَلاَ لَيْتَ شِعْرِي هَلْ أَبِيتَنَّ لَيْلَةً بِوَادٍ وَحَوْلِي إِذْخِرٌ وَجَلِيلُ فَأَخْبَرْتُ النَّبِيَّ صلى الله عليه وسلم‏

Narrated By 'Aisha : One night the Prophet 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 said, "Who is it?" It was said, "I am Sa'd, O Allah's Apostle! I have come to guard you." The Prophet then slept so soundly that we heard him snoring. Abu 'Abdullah said: 'Aisha 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.