You'll Find Out (1940)
Peter Lorre: Karl Fenninger
Kay Kyser : We have our business and you have your business.
Prince Saliano : [Affronted] Please do not refer to my calling as a business.
Kay Kyser : Oh, no offense, I just meant that everybody has to stick to his own racket.
Prince Saliano : [Insulted] Racket? Do you dare to suggest that the practice of the occult sciences is a racket?
'Prof. Karl Fenninger' : Do not merely suggest it, Mr. Kyser. Insist upon it.
'Prof. Karl Fenninger' : [Rhetorically] Why do I have to waste my time outwitting morons?