'Aamir b Abdullah Tamimi was an eminent Muslim. He settled at Basra. He was intensely religious, and would pray the whole night. Being too much absorbed in religious devotions, he was cut off from the world around him. He became critical of the irreligious ways of life of the people around him, and the people felt unhappy at his biting criticism. The Governor of Basra complained against him to Uthman, and Uthman directed that 'Aamir b Abdullah be sent to Syria.
"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