There is a concept called "Usufruct" (use fruit) where an item is lent, but it produces something during the period of the loan.
I lease my two horses to Omar for a year while he uses my house. These two horses produce a foal but the market price for houses and horses stays the same.
If I get to keep the foal, Is the value of the foal (minus the depreciation of the horses due to age) considered interest on the loan of the house?
If Omar gets the foal, it he receiving interest like a depositor at a bank?