Ezekiel 47:1-2

Then he brought me back to the door of the temple; and there was water, flowing from under the threshold of the temple toward the east, for the front of the temple faced east; the water was flowing from under the right side of the temple, south of the altar. He brought me out by way of the north gate, and led me around on the outside to the outer gateway that faces east; and there was water, running out on the right side.