Cash waqf is a type of waqf categorized as movable waqf. Like other waqf, cash waqf aims to promote service to mankind by establishing waqf using money. Historically, cash waqf was widely used by the Ottoman Empire since the end of 16th century. At that time, cash waqf was used to finance entrepreneurs for their business, and then the return was used for public service such as hospitalization, education, water channelling, bridges, roads, etc. Cash waqf played an important role in the economy of the empire.