Ezekiel 47:1-2

Then he [my guide] brought me back to the door of the house [the temple of the LORD]; and behold, water was flowing from under the threshold of the house (temple) toward the east, for the front of the temple was facing east. And the water was flowing down from under, from the right side of the house, from south of the altar. Then he brought me out by way of the north gate and led me around on the outside to the outer gate by the way of the gate that faces east. And behold, water was spurting out from the south side [of the gate]. [Zech 14:8; Rev 22:1, 2]