Musannaf Ibn Abi Shayba 13:3347

Abu Bakr narrated to us, he said: Waki' narrated to us, he said: Al-Rabi', Mubarak, and Abu Hilal narrated to us, from Al-Hasan, who said: There is no harm in a man renting a thing, then renting it out for more than what he rented it for.