Under Murabaha the seller (in this case Al Hilal Bank) discloses the true cost incurred in acquiring the Commodity, then sells it to the buyer (in this case an Al Hilal Bank customer) for an agreed profit.
The buyer ( the Al Hilal Bank customer), after purchasing the Commodity from Al Hilal Bank, sells it to a third party purchaser through Al Hilal Bank as his/her messenger. The sale proceeds are credited to the customer's account and then, acting on his / her instruction to do so, Al Hilal Bank will arrange final settlement of the liability