"The Messenger of Allah ﷺ did not sleep one night upon arriving in Al-Madinah. So he said: 'If only a righteous man would guard me tonight.'" She said: "So we were like that, when we heard the clanging of weapons. He said: 'Who is this?' So he said: 'Sa'd bin Abi Waqqas.' So the Messenger of Allah ﷺ said: 'What has brought you?' Sa'd said: 'Fear for the Messenger of Allah ﷺ came upon me, so I came to protect him.' So the Messenger of Allah ﷺ supplicated for him, then slept." (Using translation from Tirmidhī 3756)  

سَهِرَ رَسُولُ اللهِ ﷺ مَقْدِمَهُ الْمَدِينَةَ لَيْلَةً قَالَ «لَيْتَ رَجُلًا صَالِحًا مِنْ أَصْحَابِي يَحْرُسُنِي اللَّيْلَةَ» قَالَ «فَبَيْنَا نَحْنُ كَذَلِكَ إِذْ سَمِعْنَا خَشْخَشَةَ سِلَاحٍ» فَقَالَ «مَنْ هَذَا؟» قَالَ سَعْدُ بْنُ أَبِي وَقَّاصٍ فَقَالَ لَهُ رَسُولُ اللهِ ﷺ «مَا جَاءَ بِكَ؟» قَالَ سَعْدٌ «وَقَعَ فِي نَفْسِي خَوْفٌ عَلَى رَسُولِ اللهِ ﷺ فَجِئْتُ أَحْرُسُهُ فَدَعَا لَهُ رَسُولُ اللهِ ﷺ ثُمَّ نَامَ»