Each and every word of the Qur’an was recorded as soon as it was revealed by Allah to the Prophet through Angel Gabriel . The Prophet’s secretary Zaid bin Thabit and others used to record them exactly as the Prophet told them. He continued reading it back to the Prophet until 632 (CE). Shortly after the death of the Prophet in 632 (CE) Omar (May Allah be pleased with him) suggested to caliph Abu Bakr (may Allah be pleased with him) that the Qur’an should be compiled in one volume. Up to then, the Qur’an was written down in pieces in order as they were revealed.