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. (FR)
English reference (FR): Vol. 5, Book 44, Hadith 3367 (FR)
Arabic reference (FR): Book 47, Hadith 3693 (FR)