Masudi, the great historian, writes: "If the glorious name of being among the first Muslims, a comrade of the Prophet in exile, his faithful companion in the struggle for the faith, his intimate friend in life and his kinsman, if a true knowledge of his teachings and of the Book, if self abnegation and practice of justice, if honesty, purity and love of truth, if a knowledge of law and science constitutes a claim to pre-eminence then all must regard Ali as one of the foremost Muslims."
"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