What movie features the line Play It Sam?

The line "Play it, Sam" is from the movie Casablanca (1942). It's spoken by Ilsa Lund (Ingrid Bergman) to Sam (Dooley Wilson) as she asks him to play the song "As Time Goes By" on the piano.

However, the line as spoken in the movie is actually "Play it, Sam. Play 'As Time Goes By.'" The popular misquotation "Play it, Sam" often comes from a later reference in the film "The Sting" (1973) when the character Johnny Hooker (Robert Redford) asks his pianist to play "Play it, Sam," ironically referring to a scene in Casablanca.