Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))

Bukhari :: Book 6 :: Volume 60 :: Hadith 500

Narrated Zirr bin Hubaish:

I asked Ubai bin Ka'b regarding the two Muwwidhat (Surats of taking refuge with Allah). He said, "I asked the Prophet about them, He said, 'These two Surats have been recited to me and I have recited them (and are present in the Quran).' So, we say as Allah's Apostle said (i.e., they are part of the Quran"