Revelation 22:17

 "And behold, I am coming quickly. 

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

Revelation 22:7  NASB

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.

The Spirit 
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."
Revelation 14:13  Then I heard a voice from heaven say, "Write this: Blessed are the dead who die in the Lord from now on."  "Yes," says the Spirit, "they will rest from their labor, for their deeds will follow them."

and the bride 
Revelation 19:7  "Let us rejoice and be glad and give him glory! For the wedding of the Lamb has come, and his bride has made herself ready." 

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."
John 4:13-14  Jesus answered, "Everyone who drinks this water will be thirsty again, but whoever drinks the water I give them will never thirst. Indeed, the water I give them will become in them a spring of water welling up to eternal life."
John 7:37-39  On the last and greatest day of the festival, Jesus stood and said in a loud voice, "Let anyone who is thirsty come to me and drink. Whoever believes in me, as Scripture has said, rivers of living water will flow from within them." By this he meant the Spirit, whom those who believed in him were later to receive. Up to that time the Spirit had not been given, since Jesus had not yet been glorified.
Revelation 7:17  "For the Lamb at the center of the throne will be their shepherd; 'he will lead them to springs of living water.' (Isaiah 49:10) 'And God will wipe very tear from their eyes.' (Isaiah 25:18)"
Revelation 21:6  He said to me: "It is done. I am the Alpha and the Omega, the Beginning and the End. To the thirsty I will give water without cost from the spring of the water of life." 
Revelation 22:1  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 ...

(parentheses are mine)
 
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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