Virtues of the Qur'an
Bukhari :: Book 6 :: Volume 61 :: Hadith 554
Narrated Said bid Jubair:
Those Suras which you people call the Mufassal, are the Muhkam. And Ibn 'Abbas said, "Allah's Apostle died when I was a boy of ten years, and I had learnt the Muhkam (of the Qur'an).
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