Ezekiel 47: 1 - 2, 8 - 9, 12
1 Then he brought me back to the door of the temple; and behold, water was issuing from below the threshold of the temple toward the east (for the temple faced east); and the water was flowing down from below the south end of the threshold of the temple, south of the altar.
2 Then he brought me out by way of the north gate, and led me round on the outside to the outer gate, that faces toward the east; and the water was coming out on the south side.
8 And he said to me, "This water flows toward the eastern region and goes down into the Arabah; and when it enters the stagnant waters of the sea, the water will become fresh.
9 And wherever the river goes every living creature which swarms will live, and there will be very many fish; for this water goes there, that the waters of the sea may become fresh; so everything will live where the river goes.
12 And on the banks, on both sides of the river, there will grow all kinds of trees for food. Their leaves will not wither nor their fruit fail, but they will bear fresh fruit every month, because the water for them flows from the sanctuary. Their fruit will be for food, and their leaves for healing."

EWTN