Son, do not be tempted by the world for God has revealed its worthlessness. Even the world itself is aware of its transitory nature. Those who are devoted to the world are like barking dogs and ferocious animals who fall at one another, the strong devouring the weak. Some of such beasts are tied down, and are devoid of the power to harm. Some of them run amuck like camels, which roam about causing mischief. They are devoid of intelligence. They tread the path of destruction, and are enveloped in darkness. They cannot see light. They have got themselves lost in the labyrinths of the world. They are enamoured of the world and have made it their God. The world is playing with them and they are playing with the world. They have completely forgotten the 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