Fantastic Beasts and Where to Find Them The Tales of Beedle the Bard.
Fred, you next, the plump woman said. I'm not Fred, I'm George, said the boy. Honestly, woman, you call yourself our mother? Can't you tell I'm George? Sorry, George, dear. Only joking, I am Fred, said the boy, and off he went.
Ron dragged himself up to bed shortly after this. Out of respect for his feelings, Harry waited a while before going up to the dormitory himself, so that Ron could pretend to be asleep if he wanted to. Sure enough, when Harry finally entered the room Ron was snoring a little too loudly to be entirely plausible.