Nod in the Bible Encyclopedia - ISBE
nod (nodh): The land of Eden, to which Cain migrated after the
murder of his brother and his banishment by Yahweh (Gen 4:16).
Conjecture is useless as to the region intended. The ideas of
China, India, etc., which some have entertained, are
groundless. The territory was evidently at some distance, but
where is now undiscoverable.