Ezekiel 47:1

Afterward he brought me again unto the door of the house; and, behold, waters issued out from under the threshold of the house eastward: for the forefront of the house stood toward the east, and the waters came down from under from the right side of the house, at the south side of the altar and

Zechariah 14:8

And it shall be in that day, that living waters shall go out from Jerusalem; half of them toward the former sea, and half of them toward the hinder sea:in summer and in winter shall it be.

There are other possible metaphors  that pertain to water flowing out of our bellies . Ezekiel 47:1, describes water issuing out of a temple, the metaphor of our body and the temple may be applying. Different depths of water in different directions are described,(and their subsequent fruitfulness) which may also be a metaphor that Jesus alludes to with the strengths of the spirit flowing from us. Like wise in Zechariah 14.  It seems more likely that Ezekiel may be an allusion to Zechariah.14. However, neither possess the clear meaning of the Genesis 2 .which leads me to believe Jesus himself was referring to Genesis 2. All of these may also be an allusion to the crystal sea flowing from the throne of God as revealed by lKerr.

Exodus 17:6

Behold, I will stand before thee there upon the rock in Horeb; and thou shalt smite the rock, and there shall come water out of it, that the people may drink. And Moses did so in the sight of the elders of Israel

Numbers 20:11

And Moses lifted up his hand, and with his rod he smote the rock twice: and the water came out abundantly, and the congregation drank, and their beasts also

Likewise Moses striking the rock and water flowing out of it and again when he was supposed to illicit the same action by just speaking to the rock but strikes it instead  in the Numbers passage. But  (1 Corinthians 10:1-4)  explains that this ‘rock’ is a metaphor  for Christ. So, I suppose as (1 John3:2) says we will be like Christ but again the metaphor lacks the precision and volume of the Genesis passage.