Genesis 3:22-24

22 Yahweh God said, "Behold, the man has become like one of us, knowing good and evil. Now, lest he put forth his hand, and also take of the tree of life, and eat, and live forever..."  23 Therefore Yahweh God sent him forth from the garden of Eden, to till the ground from whence he was taken.  24 So he drove out the man; and he placed Cherubs at the east of the garden of Eden, and the flame of a sword which turned every way, to guard the way to the tree of life.