O you who believe, when you meet those who disbelieve marching for war, turn not your backs to them. And whoso turns his back to them on that day unless maneuvering for battle or turning to join a company -- he, indeed, incurs Allah's wrath and his refuge is hell. And an evil destination it is.
There is nothing so common in the framing of instruments as that whilst the framer of them is studious to avoid one inconvenience, he incurs another which does not present itself to his view. This is often to be seen in Acts of Parliament.