Revelation 22:1-2

 "And behold, I am coming quickly. 

Blessed is he who heeds the words of the prophecy of this book."     

Revelation 22:7  NASB

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 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.

Then the angel showed me the river 
Psalm 36:8  They feast on the abundance of your house; you give them drink from your river of delights.
Psalm 46:4  There is a river whose streams make glad the city of God, the holy place where the Most High dwells.

of the water of life 
Revelation 22:17  The Spirit and the bride say, "Come!" And let the one who hears say, "Come!" Let the one who is thirsty come; and let the one who wishes take the free gift of the water of life.
John 4:10  Jesus answered her, "If you knew the gift of God and who it is that asks you for a drink, you would have asked him and he would have given you living water."

clear as crystal 
Revelation 4:6  Also in front of the throne, there was what looked like a sea of glass, clear as crystal. 

flowing from the throne of God and of the Lamb 
Ezekiel 47:1  The man brought me back to the entrance to the temple, and I saw water coming out from under the threshold of the temple toward the east (for the temple faced east). The water was coming down from under the south side of the temple, south of the altar.
Zechariah 14:8  On that day living water will flow out from Jerusalem, half of it east to the Dead Sea and half of it west to the Mediterranean Sea, in summer and in winter.

On each side of the river stood the tree of life 
Revelation 2:7  "Whoever has ears, let them hear what the Spirit says to the churches. To the one who is victorious, I will give the right to eat from the tree of life, which is in the paradise of God."
Genesis 2:9  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.
Genesis 3:22  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."

And the leaves of the tree are for the healing of the nations 
Ezekiel 47:12  "Fruit trees of all kinds will grow on both banks of the river. Their leaves will not wither, nor will their fruit fail. Every month they will bear fruit, because the water from the sanctuary flows to them. Their fruit will serve for food and their leaves for healing."

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide. 
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