We proceeded with the Messenger of Allah ﷺ on the occasion of al-Hudaybiyyah. The Messenger of Allah ﷺ said: Who will keep watch for us? Bilal said: I (shall do). The overslept till the sun arose. The Prophet ﷺ awoke and said: Do as you used to do (i.e. offer prayer as usual). Then we did accordingly. He said: Anyone who oversleeps or forgets (prayer) should do similarly.  

أَقْبَلْنَا مَعَ رَسُولِ اللَّهِ ﷺ زَمَنَ الْحُدَيْبِيَةِ فَقَالَ رَسُولُ اللَّهِ ﷺ مَنْ يَكْلَؤُنَا فَقَالَ بِلاَلٌ أَنَا فَنَامُوا حَتَّى طَلَعَتِ الشَّمْسُ فَاسْتَيْقَظَ النَّبِيُّ ﷺ فَقَالَ افْعَلُوا كَمَا كُنْتُمْ تَفْعَلُونَ قَالَ فَفَعَلْنَا قَالَ فَكَذَلِكَ فَافْعَلُوا لِمَنْ نَامَ أَوْ نَسِيَ  

[Machine] I heard Abdullah bin Mas'ood say, "The family of the Messenger of Allah ﷺ have arrived from Hudaybiyah, so we set up camp for the night and slept on the bare ground. The Prophet ﷺ asked, 'Who will stand guard for us?' Bilal replied, 'I will.' The Prophet ﷺ said, 'Then go to sleep.' So they slept until sunrise. Some of them woke up, including so-and-so, and Umar, but the Prophet ﷺ did not wake up. He said, 'Descend, for the Prophet ﷺ has awakened.' The Prophet ﷺ said, 'Do as you were doing.' When they did, he said, 'This is how it should be for anyone who falls asleep or forgets.'"  

سَمِعْتُ عَبْدَ اللهِ بْنَ مَسْعُودٍ يَقُولُ أَهَلَّ رَسُولُ اللهِ ﷺ مِنَ الْحُدَيْبِيَةِ فَسِرْنَا لَيْلًا فَنَزَلْنَا دَهْسًا مِنَ الْأَرْضِ فَقَالَ النَّبِيُّ ﷺ «مَنْ يَكْلَأُنَا؟» قَالَ بِلَالٌ أَنَا قَالَ «إِذًا تَنَامُ» قَالَ فَنَامُوا حَتَّى طَلَعَتِ الشَّمْسُ فَاسْتَيْقَظَ فُلَانٌ وَفُلَانٌ وَمِنْهُمْ عُمَرُ وَلَمْ يَسْتَيْقِظِ النَّبِيُّ ﷺ فَقَالَ اهْبِطُوا فَاسْتَيْقَظَ النَّبِيُّ ﷺ فَقَالَ «افْعَلُوا كَمَا كُنْتُمْ تَفْعَلُونَ» فَلَمَّا فَعَلُوا قَالَ «هَكَذَا لِمَنْ نَامَ مِنْكُمْ أَوْ نَسِيَ»