The revenue is the most important tool of Islamic fiscal policy, which determined the expenditure.At the Time pentair hose of Holy Prophet, there were two types of revenue i.e.revenue collected from Muslims e.g.
Voluntary Contribution, Zakah and Revenue collected from nonmuslims, e.g.Jazia Ghanima or Booty and Fay etc.But voluntary contribution was the main source of revenue at that time.When Quranic revelation iphone 14 price miami started coming regarding to the revenue about Zakah Jazia, Booty Khums Fay then these became the main sources of revenue.