Genesis 3:22-24

Then the LORD God said, “Look, the human beings have become like us, knowing both good and evil. What if they reach out, take fruit from the tree of life, and eat it? Then they will live forever!” So the LORD God banished them from the Garden of Eden, and he sent Adam out to cultivate the ground from which he had been made. After sending them out, the LORD God stationed mighty cherubim to the east of the Garden of Eden. And he placed a flaming sword that flashed back and forth to guard the way to the tree of life.