Abdallah ibn Sa'ad

ʿAbdallāh ibn Saʿd ibn Abī Sarḥ; (Arabic: عبدالله بن سعد بن أبي السرح‎‎) was the milk brother of Uthman. His father was Sa'd ibn Abi Sarh.

During his time as governor of Egypt (646 CE to 656 CE), Ibn Abi Sarh built a strong Egyptian Arab navy. Under his leadership the Muslim navy won a number of victories including its first major naval battle against the Byzantine emperor Constans II at the Battle of the Masts in 655 CE. One of his achievements while governor of Egypt was the capture of Tripoli in 647 whereby he brought Libya into the Islamic Empire.

Al-Tabari has recorded in his tafsir that although Ibn Abi Sarh had apostatized, he returned to Islam before the conquest of Mecca. On the other hand, in his History, al-Tabari records about Ibn Abi Sarh and Muhammad that "Abdallah b. Sa`d b. Abi Sarh used to write for him. He apostatized from Islam and later returned to Islam on the day of the conquest of Mecca". A hadith in Sunan Abu Dawud records an account of Ibn Abi Sarh's tense encounter with Muhammad on that day.

When Uthman became caliph in 644 CE, he appointed Abdallah governor of Egypt replacing 'Amr ibn al-'As, with Muhammad ibn Hudhaifa as his aide. Abdallah brought over a large foreign entourage and established the diwan, "and commanded that all the taxes of the country should be regulated there".

The Copts viewed Abdallah as a "lover of money" who spent the revenues upon himself. In his time a famine struck Upper Egypt such that many Copts fled to the Nile Delta. Soon the Arabs protested his governorship, too.

Some of the protests appear to have been instigated by his aide, Muhammad ibn Hudhaifa. Muhammad's father (Hudhaifa) was an early convert to Islam who died in the Battle of Yamama. Muhammad was raised by Uthman. When he reached maturity he participated in the foreign military campaigns and accompanied Abdullāh ibn Sa‘ad ibn Abī as-Sarh to Egypt as an aide. Muhammad bin Hudhaifa admonished Abdullah, recommending changes in the government but Abdallah did not respond. After continuous efforts, eventually Muhammad ibn Hudhaifa lost patience and turned from sympathetic admonisher to a disillusioned opponent – first of Ibn Abi Sarh and later of Uthman for appointing him. Ibn Abi Sarh wrote to Uthman claiming that Muhammad was spreading sedition and that if nothing was done to stop him, the situation would escalate. Uthman attempted to silence Muhammad's protests with 30,000 dirhams and expensive presents. This bribe backfired, with Muhammad bringing the money and presents into the Great Mosque saying;

...
Wikipedia