Abu Huraira reported that when the Messenger of Allah (ﷺ) returned from the expedition to Khaibar, he travelled one night, and stopped for rest when he became sleepy. He told Bilal to remain on guard during the night and he (Bilal) prayed as much as he could, while the Messenger of Allah (ﷺ) and his Companions slept. When the time for dawn approached Bilal leaned against his camel facing the direction from which the dawn would appear but he was overcome by sleep while he was leaning against his camel, and neither the Messenger of Allah (ﷺ) nor Bilal, nor anyone else among his Companions got up, till the sun shone on them. Allah's Messenger (ﷺ) was the first of them to awake and, being startled, he called to Bilal who said:

Messenger of Allah I may my father and mother be offered as ransom for you, the same thing overpowered me which overpowered you. He (the Prophet, then) said: Lead the beasts on: so they led their camels to some distance. The Messenger of Allah (ﷺ) then performed ablution and gave orders to Bilal who pronounced the Iqama and then led them in the morning prayer. When he finished the prayer he said: When anyone forgets the prayer, he should observe it when he remembers it, for Allah has said:" And observe the prayer for remembrance of Me" (Qur'an. xx. 14). Yunus said: Ibn Shilab used to recite it like this:" (And observe the prayer) for remembrance."

حَدَّثَنِي حَرْمَلَةُ بْنُ يَحْيَى التُّجِيبِيُّ، أَخْبَرَنَا ابْنُ وَهْبٍ، أَخْبَرَنِي يُونُسُ، عَنِ ابْنِ شِهَابٍ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم حِينَ قَفَلَ مِنْ غَزْوَةِ خَيْبَرَ سَارَ لَيْلَهُ حَتَّى إِذَا أَدْرَكَهُ الْكَرَى عَرَّسَ وَقَالَ لِبِلاَلٍ ‏"‏ اكْلأْ لَنَا اللَّيْلَ ‏"‏ ‏.‏ فَصَلَّى بِلاَلٌ مَا قُدِّرَ لَهُ وَنَامَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَأَصْحَابُهُ فَلَمَّا تَقَارَبَ الْفَجْرُ اسْتَنَدَ بِلاَلٌ إِلَى رَاحِلَتِهِ مُوَاجِهَ الْفَجْرِ فَغَلَبَتْ بِلاَلاً عَيْنَاهُ وَهُوَ مُسْتَنِدٌ إِلَى رَاحِلَتِهِ فَلَمْ يَسْتَيْقِظْ رَسُولُ اللَّهِ صلى الله عليه وسلم وَلاَ بِلاَلٌ وَلاَ أَحَدٌ مِنْ أَصْحَابِهِ حَتَّى ضَرَبَتْهُمُ الشَّمْسُ فَكَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم أَوَّلَهُمُ اسْتِيقَاظًا فَفَزِعَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَقَالَ ‏"‏ أَىْ بِلاَلُ ‏"‏ ‏.‏ فَقَالَ بِلاَلٌ أَخَذَ بِنَفْسِي الَّذِي أَخَذَ - بِأَبِي أَنْتَ وَأُمِّي يَا رَسُولَ اللَّهِ - بِنَفْسِكَ قَالَ ‏"‏ اقْتَادُوا ‏"‏ ‏.‏ فَاقْتَادُوا رَوَاحِلَهُمْ شَيْئًا ثُمَّ تَوَضَّأَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَأَمَرَ بِلاَلاً فَأَقَامَ الصَّلاَةَ فَصَلَّى بِهِمُ الصُّبْحَ فَلَمَّا قَضَى الصَّلاَةَ قَالَ ‏"‏ مَنْ نَسِيَ الصَّلاَةَ فَلْيُصَلِّهَا إِذَا ذَكَرَهَا فَإِنَّ اللَّهَ قَالَ ‏{‏ أَقِمِ الصَّلاَةَ لِذِكْرِي‏}‏ ‏"‏ ‏.‏ قَالَ يُونُسُ وَكَانَ ابْنُ شِهَابٍ يَقْرَؤُهَا لِلذِّكْرَى ‏.‏