At Basra, Ali went to the house of one of his companions A'ala b Ziyad. He had constructed a spacious house. Ali was critical of the spaciousness of the house. He said, "A'ala what have you gained by constructing a spacious house in the world. You should have built a spacious house for yourself in the world Hereafter."
"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