Eve Tushnet is matching movies to the Ten Commandments. My first thought was The Postman Always Rings Twice for the Sixth Commandment, and Double Indemnity for the Fifth Commandment, but really either goes with either, and you can throw in the Ninth Commandment for both, too. Oh, and Mildred Pierce for the Fourth Commandment. Heck, the complete works of James M. Cain for all of them.