The Muslim population of the world is around one billion. Most Muslims live east of Karachi. 30% of Muslims live in the Indian subcontinent, 20 % in Sub-Saharan Africa, 17% in Southeast Asia, 18% in the Arab world, 10% in the Soviet Union and China. Turkey, Iran and Afghanistan comprise 10% of the non-Arab Middle East. Although there are Muslim minorities in almost every area including Latin America and Australia, they are most numerous in the Soviet Union, India, and central Africa. There are 5 million Muslims in the United States.
"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