Sunan an-Nasa'i, Volume 6, Book 50, Hadith 5439 (DarusSalam) ⓘ

It was narrated that 'Uqbah bin 'Amir said: "While I was leading the Messenger of Allah [SAW] (on his mount) in one of these mountain passes, he said: 'Why don't you ride, O 'Uqbah?' I had too much respect for the Messenger of Allah [SAW] to ride the mount of the Messenger of Allah [SAW]. Then he said: 'Why don't you ride, O 'Uqbah?' I was worried that I might be disobeying him, so he got off, and I rode for a little while, then I got off and the Messenger of Allah [SAW] rode. Then he said: 'Shall I not teach you two of the best Surahs that the people recite?' And he taught me: 'Say: I seek refuge with (Allah) the Lord of the daybreak,' and 'Say: I seek refuge with (Allah) the Lord of mankind." Then the Iqamah was said and he went forward and recited them. Then he passed by me and said: 'What do you think, O 'Uqbah bin 'Amir? Recite them every time you go to sleep and get up.'"

أَخْبَرَنِي مَحْمُودُ بْنُ خَالِدٍ، قَالَ حَدَّثَنَا الْوَلِيدُ، قَالَ حَدَّثَنِي ابْنُ جَابِرٍ، عَنِ الْقَاسِمِ أَبِي عَبْدِ الرَّحْمَنِ، عَنْ عُقْبَةَ بْنِ عَامِرٍ، قَالَ بَيْنَا أَقُودُ بِرَسُولِ اللَّهِ صلى الله عليه وسلم فِي نَقَبٍ مِنْ تِلْكَ النِّقَابِ إِذْ قَالَ ‏"‏ أَلاَ تَرْكَبُ يَا عُقْبَةُ ‏"‏ ‏.‏ فَأَجْلَلْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم أَنْ أَرْكَبَ مَرْكَبَ رَسُولِ اللَّهِ صلى الله عليه وسلم ثُمَّ قَالَ ‏"‏ أَلاَ تَرْكَبُ يَا عُقْبَةُ ‏"‏ ‏.‏ فَأَشْفَقْتُ أَنْ يَكُونَ مَعْصِيَةً فَنَزَلَ وَرَكِبْتُ هُنَيْهَةً وَنَزَلْتُ وَرَكِبَ رَسُولُ اللَّهِ صلى الله عليه وسلم ثُمَّ قَالَ ‏"‏ أَلاَ أُعَلِّمُكَ سُورَتَيْنِ مِنْ خَيْرِ سُورَتَيْنِ قَرَأَ بِهِمَا النَّاسُ ‏"‏ ‏.‏ فَأَقْرَأَنِي ‏{‏ قُلْ أَعُوذُ بِرَبِّ الْفَلَقِ ‏}‏ وَ ‏{‏ قُلْ أَعُوذُ بِرَبِّ النَّاسِ ‏}‏ فَأُقِيمَتِ الصَّلاَةُ فَتَقَدَّمَ فَقَرَأَ بِهِمَا ثُمَّ مَرَّ بِي فَقَالَ ‏"‏ كَيْفَ رَأَيْتَ يَا عُقْبَةُ بْنَ عَامِرٍ اقْرَأْ بِهِمَا كُلَّمَا نِمْتَ وَقُمْتَ ‏"‏ ‏.‏