In his poem "Asrar-i-Khudi", Allama Iqbal has paid tribute to Ali in the following terms: Ali, the son-in-law of the Prophet was a man of many qualities. He gave fresh vigor to Faith and brought honors to the community of the faithful. He developed self-disciplines and killed avarice. A person who knows and controls himself rules the world.
"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