It was narrated from 'Uqbah bin 'Amir that: The Prophet [SAW] said: "There have been revealed to me Verses the like of which has never been seen: “Say: I seek refuge with (Allah) the Lord of the daybreak...' to the end of the Surah, and 'Say: I seek refuge with (Allah) the Lord of mankind...' to the end of the Surah”"
SahihSahihHasanBook 50 · Hadith 13