Revelation 22:1-2

Then the angel showed me the river of the water of life, flowing with water clear as crystal, continuously pouring out from the throne of God and of the Lamb. The river was flowing in the middle of the street of the city, and on either side of the river was the Tree of Life, with its twelve kinds of ripe fruit according to each month of the year. The leaves of the Tree of Life are for the healing of the nations.