Ezekiel 47:1

Ezekiel 47:1 AMP

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.
AMP: Amplified Bible