Musannaf Ibn Abi Shayba 13:3335

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Sufyan narrated to us, from Mansur, from Ibrahim: That he disliked for a man to rent a house, then rent it out for more than what he rented it for. He said: I said to Ibrahim, "If he rents it out for more, to whom does the profit belong?" He said: "To its owner."