Uqbah bin Amir Al-Juhni narrated that:
the Prophet said: "Allah has revealed to me Ayat the likes of which have not been seen: "Say: I seek refuge in the Lord of mankind…" until the end of the Surat. "Say: I seek refuge in the Lord of Al-Falaq…" until the end of the Surat. (IT)
English reference (IT): Vol. 5, Book 44, Hadith 3367 (IT)
Arabic reference (IT): Book 47, Hadith 3693 (IT)