-->
Abu Hamid Al Saadi Ansari, a companion of the Holy Prophet and who had fought at the battle of Badr mourned the death of Uthman. He said that those who had murdered their Caliph had violated the right to be called as Muslims. He took the oath that after the death of Uthman he would never laugh and would continue to mourn his death. He fulfilled this oath, and never laughed again in life.
"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