Overview
Abd Allah ibn Sa'd ibn Abi al-Sarh was an Arab administrator, scribe, and military commander, who was an early convert to, then later apostate from Islam. He was a scriber of the Quran (كاتب الوحي) and governor of Upper Egypt for the Muslim caliphate during the reign of ʿUthmān (644–656). He was also the co-founder (with the future caliph Muʿāwiyah I) of the Islamic navy which seized Cyprus (647–649) and defeated a Byzantine fleet off Alexandria in 652.
Origin
al-Sarh came from the Banu Amir ibn Lu'ayy clan of the Quraish tribe and was an adopted brother of the caliph Uthman. After converting to Islam, he became a Companion of Muhammad and, later, a Scriber.
During Muhammad's era
Claims of fabrication against Muhammad
During his time as a scriber, Muhammad would dictate to him a revelation to be written down, as he did with other scribes. al-Sarh left Islam and fled to Mecca after claiming that he had realised Muhammad was fabricating revelations. Abi Saleh, narrated from Ibn Abbas, recorded that:
From Wikipedia (CC BY-SA 4.0).