Syed Amir Ali has assessed the achievements of Ali in the following terms: "His bravery won him the title of the "Lion of God", and his learning that of the "Gate of Knowledge". Chivalrous, humane, and forbearing to the verge of weakness as a ruler, he came before his time. Most of the grand undertakings initiated by Umar for the welfare of the people were due to his counsel. Ever ready to succor the weak, and to redress the wrongs of the injured, the accounts of his valorous deeds are recited with enthusiasm from the bazaars in Cairo to those of Delhi. With his dying breath he inculcated lessons of charity, love, humility and self-abnegation to his sons. He expressly ordered them that no harshness should be shown towards his murderer, who should be executed with one blow."
"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