Tree of Life 
Genesis 2: 4-17 Adam and Eve 4 This is the account of the heavens and the earth when they were created. When the LORD God made the earth and the heavens- 5 and no shrub of the field had yet appeared on the earth and no plant of the field had yet sprung up, for the LORD God had not sent rain on the earth and there was no man to work the ground, 6 but streams [or mists] came up from the earth and watered the whole surface of the ground- 7 the LORD God formed the man from the dust of the ground and breathed into his nostrils the breath of life, and the man became a living being.
8 Now the LORD God had planted a garden in the east, in Eden; and there he put the man he had formed. 9 And the LORD God made all kinds of trees grow out of the ground—trees that were pleasing to the eye and good for food. In the middle of the garden were the tree of life and the tree of the knowledge of good and evil.
10 A river watering the garden flowed from Eden; from there it was separated into four headwaters. 11 The name of the first is the Pishon; it winds through the entire land of Havilah, where there is gold. 12 (The gold of that land is good; aromatic resin and onyx are also there.) 13 The name of the second river is the Gihon; it winds through the entire land of Cush. 14 The name of the third river is the Tigris; it runs along the east side of Asshur. And the fourth river is the Euphrates.
15 The LORD God took the man and put him in the Garden of Eden to work it and take care of it. 16 And the LORD God commanded the man, "You are free to eat from any tree in the garden; 17 but you must not eat from the tree of the knowledge of good and evil, for when you eat of it you will surely die." 
Genesis 3: 21-24
The Fall of Man
21 The LORD God made garments of skin for Adam and his wife and clothed them. 22 And the LORD God said, "The man has now become like one of us, knowing good and evil. He must not be allowed to reach out his hand and take also from the tree of life and eat, and live forever." 23 So the LORD God banished him from the Garden of Eden to work the ground from which he had been taken. 24 After he drove the man out, he placed on the east side of the Garden of Eden, cherubim and a flaming sword flashing back and forth to guard the way to the tree of life.
Proverbs 3: 13-18
13 Blessed is the man who finds wisdom, the man who gains understanding,
14 for she is more profitable than silver and yields better returns than gold.
15 She is more precious than rubies; nothing you desire can compare with her.
16 Long life is in her right hand; in her left hand are riches and honor.
17 Her ways are pleasant ways, and all her paths are peace.
18 She is a tree of life to those who embrace her; those who lay hold of her will be blessed. 
Proverbs 11: 30
30 The fruit of the righteous is a tree of life, and he who wins souls is wise. 
Proverbs 13: 12
12 Hope deferred makes the heart sick, but a longing fulfilled is a tree of life.
Proverbs 15: 4
4 The tongue that brings healing is a tree of life, but a deceitful tongue crushes the spirit. 
Revelation 2: 1-7
To the church in Ephesus 1 "To the angel of the church in Ephesus write: These are the words of him who holds the seven stars in his right hand and walks among the seven golden lampstands [Jesus] : 2 I know your deeds, your hard work and your perseverance. I know that you cannot tolerate wicked men, that you have tested those who claim to be apostles but are not, and have found them false. 3 You have persevered and have endured hardships for my name, and have not grown weary. 4 Yet I hold this against you: You have forsaken your first love. 5 Remember the height from which you have fallen! Repent and do the things you did at first. If you do not repent, I will come to you and remove your lampstand from its place. 6 But you have this in your favor: You hate the practices of the Nicolaitans, which I also hate. 7 He who has an ear, let him hear what the Spirit says to the churches. To him who overcomes, I will give the right to eat from the tree of life, which is in the paradise of God.
Revelation 22: 1-6
The River of Life 1 Then the angel showed me the river of the water of life, as clear as crystal, flowing from the throne of God and of the Lamb 2 down the middle of the great street of the city. On each side of the river stood the tree of life, bearing twelve crops of fruit, yielding its fruit every month. And the leaves of the tree are for the healing of the nations. 3 No longer will there be any curse. The throne of God and of the Lamb will be in the city, and his servants will serve him. 4 They will see his face, and his name will be on their foreheads. 5 There will be no more night. They will not need the light of a lamp or the light of the sun, for the Lord God will give them light. And they will reign for ever and ever. 6 The angel said to me, "These words are trustworthy and true. The Lord, the God of the spirits of the prophets, sent his angel to show his servants the things that must soon take place."
Revelation 22: 7-15 Jesus Is Coming 7 "Behold, I am coming soon! Blessed is he who keeps the words of the prophecy in this book."
8 I, John, am the one who heard and saw these things. And when I had heard and seen them, I fell down to worship at the feet of the angel who had been showing them to me. 9 But he said to me, "Do not do it! I am a fellow servant with you and with your brothers the prophets and of all who keep the words of this book. Worship God!"
10 Then he told me, "Do not seal up the words of the prophecy of this book, because the time is near. 11 Let him who does wrong continue to do wrong; let him who is vile continue to be vile; let him who does right continue to do right; and let him who is holy continue to be holy."
12 "Behold, I am coming soon! My reward is with me, and I will give to everyone according to what he has done. 13 I am the Alpha and the Omega, the First and the Last, the Beginning and the End.
14 "Blessed are those who wash their robes, that they may have the right to the tree of life and may go through the gates into the city [the New Jerusalem] . 15 Outside are the dogs, those who practice magic arts, the sexually immoral, the murderers, the idolaters and everyone who loves and practices falsehood.
16 "I, Jesus, have sent my angel to give you this testimony for the churches. I am the Root and the Offspring of David, and the bright Morning Star."
17 The Spirit and the bride say, "Come!" And let him who hears say, "Come!" Whoever is thirsty, let him come; and whoever wishes, let him take the free gift of the water of life.
18 I warn everyone who hears the words of the prophecy of this book: If anyone adds anything to them, God will add to him the plagues described in this book. 19 And if anyone takes words away from this book of prophecy, God will take away from him his share in the tree of life and in the holy city, which are described in this book.
20 He who testifies to these things says, "Yes, I am coming soon." Amen. Come, Lord Jesus.
21 The grace of the Lord Jesus be with God's people. Amen.
