Cain and Abel: Brothers at War

Ancient rivalry, conflict between brothers and a tale of murder and punishment, but how does the Koran's version of Cain and Abel differ from that of the Old Testament? Ancient rivalry, conflict between brothers and a tale of murder and punishment, but how does the Koran's version of Cain and Abel differ from that of the Old Testament? Ancient rivalry, conflict between brothers and a tale of murder and punishment, but how does the Koran's version of Cain and Abel differ from that of the Old Testament? Ancient rivalry, conflict between brothers and a tale of murder and punishment, but how does the Koran's version of Cain and Abel differ from that of the Old Testament?