Abdullah b Sa'ad sought the permission of Uthman to undertake Jihad against North Africa. In Madina, Uthman summoned a meeting of the Majlis-i-Shura to consider the question. After discussion it was decided that a campaign against North Africa should be undertaken. It was also decided that a force from Madina should be sent to assist the Egyptian forces under Abdullah b Sa'ad. A force of 10,000 warriors was raised in Madina, and sent to Egypt under the command of Harith b Al Hakam, in the fall of 647 C.E. The Madina force included Ma'bad b Abbas; Abdul Rahman b Abu Bakr; Abdullah b Umar; Ubaidullah b Umar; Abdullah b Zubair; Abdullah b 'Amr Al 'Aas and Marwan b Al Hakam.
"When a person dies, his works end, except for three: ongoing charity, knowledge that is benefited from, and a righteous child who prays for him."
Prophet Mohammed (PBUH)
"The best of what a man leaves behind are three: a righteous child who supplicates for him, ongoing charity the reward of which reaches him, and knowledge that is acted upon after him."
Sunan Ibn Mājah
"Every day two angels come down from Heaven and one of them says, 'O Allah! Compensate every person who spends in Your Cause,' and the other (angel) says, 'O Allah! Destroy every miser.'"
Sahih Bukhari