It is related that on one occasion a supplicant approached Ali and asked him to give him some bread. Ali asked his slave Qanbar to attend to the supplicant. Qanbar came to Ali and said that the bread was in a saddle bag. Ali said, "Give him the saddle bag". At this Qanbar said that the saddle bag was on the camel. Ali said, "Give him the camel". Qanbar said that the camel was in a row of camels. Ali said, "Give him all of the camels".
"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