This is totally prohibited and it is clear riba.

My father is buying a property and he has already paid 85 percent of the money. Now due to financial difficulties he is not able to pay the rest .so now he wants to borrow about 50000 SR from someone to completely buy the property. Now lender has a condition that he willgive us the money if we give him the monthly rent (we will receive monthly rent from the property)until we pay him the 50000 back

Riba |