Abdullah a scribe of the prophet was expelled from Medina for associating with the Quraysh. Muhammad had scribes write his revelations down for him. One scribe was `Abdullah Ibn Sa'd Ibn Abi Sarh. As Sarh wrote these revelations down, he frequently made suggestions on improving their wording. Muhammad often agreed and allowed the changes to be made. Eventually, Sarh left Islam, knowing it could not be from God if a mere scribe were allowed to change God's word. Later, after the conquest of Mecca, Muhammad ordered Sarh's death.