Virtues of the Qur'an

Bukhari :: Book 6 :: Volume 61 :: Hadith 525

Narrated Qatada:

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."