In his book, Studies in Muhammadanism, John J. Pool observes as follows: "The fact is that Ali was too mild a man for the stirring times in which he lived. He was too slow to resolve and too undecided in action. At any time he preferred compromise and delay to energy and promptness, and with fatal results. The death of Ali was an epoch-making event. We come now to the parting of ways. Henceforward the Commanders of the Faithful ceased to be elected by the votes of the people of Madina or Makkah. Arabia was no longer to be the seat of temporal power. For the future, in Islam, might was to take the place of right".
"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