Some person sold a car in installments and after a while the seller re-purchased it again

A: It is impermissible for whoever sells a commodity for a price that is delayed for a fixed time to purchase it for a price that is less than that of its sale because this is called `Inah sale (sale with immediate cash repurchase for profit), which is impermissible and a form of Riba (usury/interest).May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family and Companions.