Mother said," mocked the king. "Don't be childish." "We're children," Myrcella declared haughtily. "We're supposed to be childish." The Hound laughed. "She has you there.
George R. R. Martin (2012). “George R. R. Martin's A Game of Thrones 5-Book Boxed Set (Song of Ice and Fire Series): A Game of Thrones, A Clash of Kings, A Storm of Swords, A Feast for Crows, and and A Dance with Dragons”, p.748, Bantam