"The common room was lit with the glow of the dying fire, still littered from the debris from the party. It was deserted.
'Are you sure you were't dreaming, Ron?'
'I'm telling you, I saw him!'
'What's all this noise?'
'Professor McGonagall told us to go to bed!'
A few of the girls had come down their staircase, pulling on dressing gowns and yawning. Boys, too, were reappearing.
'Excellent, are we carrying on?' said Fred Weasley brightly."
-Harry Potter and the Prisoner of Azkaban, pg. 266