The tree of life

Then the angel showed me the river of the water of life, bright as crystal, flowing from the throne of God and of the Lamb.
Revelation 22:1

Blessed are those who wash their robes, so that they may have the right to the tree of life and that they may enter the city by the gates.
Revelation 22:14

and if anyone takes away from the words of the book of this prophecy, God will take away his share in the tree of life and in the holy city, which are described in this book.
Revelation 22:19

He who has an ear, let him hear what the Spirit says to the churches. To the one who conquers I will grant to eat of the tree of life, which is in the paradise of God.
Revelation 2:7

And out of the ground the LORD God made to spring up every tree that is pleasant to the sight and good for food. The tree of life was in the midst of the garden, and the tree of the knowledge of good and evil.
Genesis 2:9

Then the LORD God said, "Behold, the man has become like one of us in knowing good and evil. Now, lest he reach out his hand and take also of the tree of life and eat, and live forever-"
Genesis 3:22

He drove out the man, and at the east of the garden of Eden he placed the cherubim and a flaming sword that turned every way to guard the way to the tree of life.
Genesis 3:24