Sunan an-Nasa'i 846
It was narrated from 'Abdullah bin Abi Qatadah that his father said:
"We were with the Messenger of Allah (ﷺ) when some of the people said: 'Why do you not stop with us to rest awhile, 0 Messenger of Allah (ﷺ)?' He said: 'I am afraid that you will sleep and miss the prayer.' Bilal said:'I will wake you up.' So they lay down and slept, and Bilal leaned back on his mount. Then the Messenger of Allah (ﷺ) woke up when the sun had already started to rise, and he said: '0 Bilal, what about what you told us?' He said: 'I 
have never slept like that before.' The Messenger of Allah (ﷺ) said: 'Allah, the Mighty and Sublime, takes your souls when He wills and sends them back when He wills.' Stand up 0 Bilal and call the people to prayer.' Then Bilal stood up and & called the Adhan, and they  performed Wudu' - that is, when the sun had risen (fully) - "then he  stood and lead them in prayer."
أَخْبَرَنَا هَنَّادُ بْنُ السَّرِيِّ، قَالَ حَدَّثَنَا أَبُو زُبَيْدٍ، - وَاسْمُهُ عَبْثَرُ بْنُ الْقَاسِمِ - عَنْ حُصَيْنٍ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي قَتَادَةَ، عَنْ أَبِيهِ، قَالَ كُنَّا مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم إِذْ قَالَ بَعْضُ الْقَوْمِ لَوْ عَرَّسْتَ بِنَا يَا رَسُولَ اللَّهِ ‏.‏ قَالَ ‏"‏ إِنِّي أَخَافُ أَنْ تَنَامُوا عَنِ الصَّلاَةِ ‏"‏ ‏.‏ قَالَ بِلاَلٌ أَنَا أَحْفَظُكُمْ ‏.‏ فَاضْطَجَعُوا فَنَامُوا وَأَسْنَدَ بِلاَلٌ ظَهْرَهُ إِلَى رَاحِلَتِهِ فَاسْتَيْقَظَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَقَدْ طَلَعَ حَاجِبُ الشَّمْسِ فَقَالَ ‏"‏ يَا بِلاَلُ أَيْنَ مَا قُلْتَ ‏"‏ ‏.‏ قَالَ مَا أُلْقِيَتْ عَلَىَّ نَوْمَةٌ مِثْلُهَا قَطُّ ‏.‏ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ إِنَّ اللَّهَ عَزَّ وَجَلَّ قَبَضَ أَرْوَاحَكُمْ حِينَ شَاءَ فَرَدَّهَا حِينَ شَاءَ قُمْ يَا بِلاَلُ فَآذِنِ النَّاسَ بِالصَّلاَةِ ‏"‏ ‏.‏ فَقَامَ بِلاَلٌ فَأَذَّنَ فَتَوَضَّئُوا - يَعْنِي حِينَ ارْتَفَعَتِ الشَّمْسُ - ثُمَّ قَامَ فَصَلَّى بِهِمْ ‏.‏