O O Ye who believe! make not your alms void by laying an obligation and by hurt, like unto him who expendeth his substance to be seen of men, and believeth not in Allah and the Last Day. The likeness of him is as the likeness of a smooth stone whereon is dust; a heavy rain falleth upon it, and leaveth it bare. They shall not have power over aught of that which they have earned and Allah shall not guide the disbelieving people.