Harry Potter and the Chamber of Secrets
"You've forgotten the magic word," said Harry irritably.
The effect of this simple sentence on the rest of the family was incredible: Dudley gasped and fell off his chair with a crash that shook the whole kitchen; Mrs. Dursley gave a small scream and clapped her hands over her mouth; Mr. Dursley jumped to his feet, veins throbbing in his temples.
"I meant 'please'!" said Harry quickly. "I didn't mean —"
"WHAT HAVE I TOLD YOU," thundered his uncle, spraying spit over the table, "ABOUT SAYING THE 'M' WORD IN OUR HOUSE?" (1.13-16)
"Harry Potter got a Nimbus Two Thousand last year. Special permission from Dumbledore so he could play for Gryffindor. He's not even that good, it's just because he's famous...famous for having a stupid scar on his forehead..."
Malfoy bent down to examine a shelf full of skulls.
"...everyone thinks he's so smart, wonderful Potter with his scar and his broomstick —"
"You have told me this at least a dozen times already," said Mr. Malfoy, with a quelling look at his son. "And I would remind you that it is not – prudent – to appear less than fond of Harry Potter, not when most of our kind regard him as the hero who made the Dark Lord disappear —" (4.65-68)
Everyone filed out of the classroom except him and Ron, who was whacking his wand furiously on the desk.
"Stupid – useless – thing —"
"Write home for another one," Harry suggested as the wand let off a volley of bangs like a firecracker.
"Oh, yeah, and get another Howler back," said Ron, stuffing the now hissing wand into his bag. "It's your own fault your wand got snapped —" (6.73-75)