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."
Hadith ReferenceSahih Bukhari / The Book of The Virtues of The Quran / Hadith: 5003
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة