'River' in the Bible

saying to the sixth angel who had the trumpet, “Release the four angels who are bound at the great river Euphrates.”

Then the sixth angel poured out his bowl on the great river, the Euphrates; and its water was dried up, so that the way would be prepared for [the coming of] the kings from the east.

Then the angel showed me a river of the water of life, clear as crystal, flowing from the throne of God and of the Lamb (Christ),

in the middle of its street. On either side of the river was the tree of life, bearing twelve kinds of fruit, yielding its fruit every month; and the leaves of the tree were for the healing of the nations.