the bank buys assets (such as real estate, machineries, and equipment) based on rent promise ( promise to rent) by the client for an agreed period and against a certain price . The bank buys various types of assets according to the client’s needs and rents it for them against payments that includes the original amount and the renting return, (renting revenue that will be changed in the second year) to be paid on the maturity date or in installments to get its ownership back to the client.