Sunan an-Nasa'i 954
It was narrated that Uqbah bin Amr said:
The Messenger of Allah (ﷺ) said: 'Some verses were revealed to me tonight, the likes of which have never been seen: "Say: I seek refuge with (Allah), the Lord of the daybreak." [Surat al-Falaq:1] and "Say: I seek refuge with (Allah) the Lord of mankind." [Surat an-Naas:1] '
أَخْبَرَنِي مُحَمَّدُ بْنُ قُدَامَةَ، قَالَ حَدَّثَنَا جَرِيرٌ، عَنْ بَيَانٍ، عَنْ قَيْسٍ، عَنْ عُقْبَةَ بْنِ عَامِرٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ آيَاتٌ أُنْزِلَتْ عَلَىَّ اللَّيْلَةَ لَمْ يُرَ مِثْلُهُنَّ قَطُّ ‏{‏ قُلْ أَعُوذُ بِرَبِّ الْفَلَقِ ‏}‏ وَ ‏{‏ قُلْ أَعُوذُ بِرَبِّ النَّاسِ ‏}‏ ‏"‏ ‏.‏