The Tree Of Life

In the Garden of Eden
And the LORD God planted a garden eastward in Eden; and there he put the man whom he had formed. And out of the ground made the LORD God to grow every tree that is pleasant to the sight, and good for food; the tree of life also in the midst of the garden, and the tree of knowledge of good and evil. (Genesis 2:8-9 KJV)

In Paradise of God
He that hath an ear, let him hear what the Spirit saith unto the churches; To him that overcometh will I give to eat of the tree of life, which is in the midst of the paradise of God. (Revelations 2:7 KJV)

In the New Jerusalem, two trees of life
In the midst of the street of it, and on either side of the river, was there the tree of life, which bare twelve manner of fruits, and yielded her fruit every month: and the leaves of the tree were for the healing of the nations. (Revelations 22:2 KJV)

Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city. (Revelations 22:14 KJV)