Sahih al-Bukhari 2885
Sahih al-Bukhari · Book 56: Fighting for the Cause of Allah (Jihaad) · Vigilance during holy battles in Allah's Cause
Narrated `Aisha:
حَدَّثَنَا إِسْمَاعِيلُ بْنُ خَلِيلٍ ، أَخْبَرَنَا عَلِيُّ بْنُ مُسْهِرٍ ، أَخْبَرَنَا يَحْيَى بْنُ سَعِيدٍ ، أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ عَامِرِ بْنِ رَبِيعَةَ ، قَالَ سَمِعْتُ عَائِشَةَ ـ رضى الله عنها ـ تَقُولُ كَانَ النَّبِيُّ صلى الله عليه وسلم سَهِرَ فَلَمَّا قَدِمَ الْمَدِينَةَ قَالَ " لَيْتَ رَجُلاً مِنْ أَصْحَابِي صَالِحًا يَحْرُسُنِي اللَّيْلَةَ ". إِذْ سَمِعْنَا صَوْتَ سِلاَحٍ فَقَالَ " مَنْ هَذَا ". فَقَالَ أَنَا سَعْدُ بْنُ أَبِي وَقَّاصٍ، جِئْتُ لأَحْرُسَكَ. وَنَامَ النَّبِيُّ صلى الله عليه وسلم .
The Prophet (ﷺ) was vigilant one night and when he reached Medina, he said, "Would that a pious man from my companions guard me tonight!" Suddenly we heard the clatter of arms. He said, "Who is that? " He (The new comer) replied, " I am Sa`d bin Abi Waqqas and have come to guard you." So, the Prophet (ﷺ) slept (that night).