Virtues of the Qur'an
Bukhari :: Book 6 :: Volume 61 :: Hadith 525
I asked Anas bin Malik: "Who collected the Qur'an at the time of the Prophet ?" He replied, "Four, all of whom were from the Ansar: Ubai bin Ka'b, Mu'adh bin Jabal, Zaid bin Thabit and Abu Zaid."
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