Cain was exiled to Jiuyi mountain by God

《Genesis》4:16 And Cain went out from the presence of the LORD, and dwelt in the land of Nod, on the east of Eden.
Explain:
In Hebrew “Nod” means hanging around.so it is Jiuyi mountain in Yongzhou City ,Hunan province, China
“Jiuyi moutain” means: There are nine similar mountain peeks which make people lose the way.so people had to hang around when them arrived there.