So this was asked in Quora : My response below: The verse is NOT non-existent. The thing is the reference to a river flowing out occurs in a few places in the Old Testament. Thus when Jesus says "As the Scripture has said ..." He is referring to a theme that occurs repeatedly in the Old Testament. It is important to understand what "the rivers flowing out" imply in the Old Testament. They always refer to the dwelling place of God . These occurs in a few places. As early as the Book of Genesis, we see this Scripture in Genesis 2:10 "A river flowed out of Eden to water the garden, and there it divided and became four rivers." (Genesis 2:10, ESV) Therefore, the source of the river = Eden. And Eden is none other than the very dwelling place of God. Biblical theology helps us understand Eden as a "type" of temple. Where else do we see this? We see this again in Ezekiel 47. In Ezekiel 47, in Ezekiel's vision of a New Temple, he pi...