Book of Adam and Eve

5 But when God made Adam go out of the garden,  He did not place him on the border of it northward. This was so that he and Eve would not be able to go near to the sea of water where they could wash themselves in it,  be cleansed from their sins, erase the transgression they had committed, and be no longer reminded of it in the thought of their punishment.

6 As to the southern side of the garden, God did not want Adam to live there either; because, when the wind blew from the north, it would bring him, on that southern side, the delicious smell of the trees of the garden.    

Wherefore God did not put Adam there. This was so that he would not be able to smell the sweet smell of those trees, forget his transgression, and find consolation for what he had done by taking delight in the smell of the trees and yet not be cleansed from his transgression.