Uthman was known for the firmness and steadfastness of his faith When he was converted to Islam. His uncle Hakam, his mother Urwa, and other family members put great pressure on him to recant from Islam and revert to the faith of his forefathers. Uthman did not yield to such pressure and remained firm and steadfast in his faith in Islam. When in his last days, Uthman was besieged by the rioters in his house at Madina he was assured that if he abdicated no physical harm would come to him. He refused to abdicate because he held that he could not divest himself of the robe with which God had vested him. He preferred to lay down his life rather than compromise with the principles for which he stood.
"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