Ibn Abbas is reported to have said that the assassination of Uthman was the work of some misguided persons. The Muslims could not agree to the murder of their Caliph. Ibn Abbas added that. if the Muslims had agreed to the murder of Uthman, the Muslims would have been stoned to death by the heavens as had been done in the case of the people of Lut.
"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