The Land of Nod

"...At last I slid off into a light doze, and had pretty nearly made a good offing towards the land of Nod, when I heard a heavy footfall in the passage...." (Chapter 4)

The Land of Nod (Hebrew: ’eretz-Nod) is a place in the Book of Genesis of the Hebrew Bible, located "to the east of Eden", to which Cain chose to flee to after murdering his brother Abel. The Hebrew word nod means "wandering".

http://en.wikipedia.org/wiki/Land_of_Nod