Genesis 2:9

9 Out of the ground Yahweh God made every tree to grow 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 the knowledge of good and evil. 

Revelation 22:14

14 Blessed are those who do his commandments, that they may have the right to the tree of life, and may enter in by the gates into the city.