Genesis 2:9,17
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 middle of the garden, and the tree of knowledge of good and evil.
Nave's Topical Index—AKJV

Genesis 3:3,24
But of the fruit of the tree which is in the middle of the garden, God has said, You shall not eat of it, neither shall you touch it, lest you die.
Nave's Topical Index—AKJV

Revelation 22:2
In the middle of the street of it, and on either side of the river, was there the tree of life, which bore twelve manner of fruits, and yielded her fruit every month: and the leaves of the tree were for the healing of the nations.
Nave's Topical Index—AKJV