Harry Potter and the Prisoner of Azkaban
How we cite our quotes:
"Naturally," said Madame Rosmerta, with a small laugh. "Never saw one without the other, did you? The number of times I had them in here – ooh, how they used to make me laugh. Quite the double act, Sirius Black and James Potter!" (10.3.140)
Rosmerta's description of Sirius and James as a "double act" make them sound an awful lot like Fred and George Weasley.
"I gotta tell yeh, I thought you two'd value yer friend more'n broomsticks or rats. That's all."
Harry and Ron exchanged uncomfortable looks. (14.1.40-41)
Hagrid pretty much sums up the theme of friendship in this novel and in a way that teaches Ron and Harry a lesson without sounding like an after-school special. Well-played, Hagrid.
"THEN YOU SHOULD HAVE DIED!" roared Black. "DIED RATHER THAN BETRAY YOUR FRIENDS, AS WE WOULD HAVE DONE FOR YOU!" (19.165)
OK, we take it back. Hagrid ties with Sirius Black for best summation of the book's friendship theme, though Sirius expresses a darker and more adult take on the theme.