I don't go looking for trouble Trouble usually finds me?

The quotation, 'I don't go looking for trouble; trouble usually finds me,' was used by J.K. Rowling in the book, 'Harry Potter and the Prisoner of Azkaban'; Harry says it. I've a strong feeling this quote has been around a lot longer than Harry Potter, or even than I have, but can't pin it down. The Harry Potter reference seems to satisfy many inquiries.