“I got this one,” he indicated another slash to his face, “for asking how much Muggle blood she and her brother have got.”

“Blimey, Neville,” said Ron, “there’s a time and a place for getting a smart mouth.”

“You didn’t hear her,” said Neville. “You wouldn’t have stood it either. The thing is, it helps when people stand up to them, it gives everyone hope. I used to notice when you did it, Harry.”

Harry Potter and the Deathly Hallows – J.K. Rowling