'Water of Life' in the Bible

And he said unto me, "It is done. I am Alpha and Omega, the beginning, and the end. I will give to him that is athirst of the well of the water of life, free.

And he showed me a pure river of water of life, clear as crystal, proceeding out of the seat of God and of the lamb.

And the spirit and the bride said, "Come." And let him that heareth, say also "Come." And let him that is athirst come. And let whosoever will, take of the water of life free.