From this Web Site : Jesus Hints at a Gap: Similitude The Holy Spirit/Jesus and Eden

The Garden of Eden was seeded from plants from heaven and not present on earth (and not newly created or made) (Ikat kerr)

Planet earth is a perfect creation but falls into a  judgement of death and darkness and God remakes it with an added special new central creation of the Garden of Eden ‘seeded’ from heaven. Out of the belly of the earth through Eden flow rivers  that give life to Eden and all around.

Humans fall and are judged and in darkness and are reborn with an indwelling form Gods Holy Spirit and Jesus implanted from heaven which leads to living water proceeding out of the belly of humans which gives abundant life (and yields fruit) to those around.

Some properties of the living water given to us by The Holy Spirit may be revealed by the literal meaning of the names of the Rivers: Pison, Gihon, Hiddekel and Euphrates meaning overflowing, bursting forth, rapid and  fruitful respectively.

I suspect and it may also be that the actions of the living water are hinted at in the literal meaning of the places they reach.(Literal meanings in brackets)

Pison reaches or encircles Havilah (circle) where there is gold, bedelium and onyx (precious metals and stones). Gihon encapsulates the whole of Kush (black). Hiddekel goes forward or east towards Ashshuwr (a step or an Assyrian}, Euphrates is only described with its name and means fruitful (perhaps an indication of  its prime attribute and action of the Holy Spirit in this metaphor).

lKerr has revealed the importance of precious stones within God and as gifts for us and they seem to have some other value or function as well as aesthetics. lKerr has also revealed how the River of Life runs from the throne room of God (and does contain precious stones within it) and so rivers of life coming from out of our bellies is being made in His likeness.  The exact function of precious stone remains a mystery to me though. God gifts us a a precious stone within us at salvation. l(Kat kerr) The antichrist is thought to be referred to as an Assyrian.

So with the literal meaning of the destinies and paths of the Eden rivers in mind it may be that the living water that proceeds out of our bellies is intimately related to precious stone ‘gifts’, and encapsulates and separates us from darkness and will confront evil and is always fruitful.

So did Jesus hint at Gap Theory when he said that ‘scripture says living water will flow out of our bellies’ (John 7:38) because I can find no scripture that does explicitly say that.  However, the metaphor with  the rivers of Eden for the Holy Spirit does describe it, but the metaphor only really  works with Gap Theory as Eden is planted on a remade earth and The Holy Spirit is planted in a newly born again Christian. There are more references to living water in Biblical  Evidence of a Gap on this site and summarised here.

 Maybe Jesus  said this just  for  the creation debate today?