After reconversion to Islam, Abdullah b Sa'ad proved to be a good Muslim. He allowed all the injunctions of Islam. He participated in the various battles, and gave a good account of himself. He was intelligent, and was particularly good in revenue collection. Umar was a good judge of men, and impressed by Abdullah's abilities, he appointed him as a Governor of Upper Egypt. As Governor Abdullah b Sa'ad did well and Umar was well pleased with him.