Muhammad's 23 years of prophetic ministry During Muhammad's 23 years of prophetic ministry, Muhammad claimed to receive revelations from God, given to him by an angel. Muhammad used many men, functioning as scribes, to write down these assumed revelations. Different scribes wrote down different revelations. `Abdullah Sarh was one of Muhammad's scribes. Evidently, Sarh had some literary skills, sometimes suggesting improvements to Muhammad in the wording of the recited Qur'an. Muhammad often agreed with Sarh's improvements, and allowed the changes to be made. Sarh eventually left Islam because he knew that