One of the four rivers that surrounded Eden. It is currently unknown which river it is.
Genesis 2:10A river flowed out of Eden to water the garden, and there it divided into four headwaters.Genesis 2:11The name of the first is Pishon; it winds through the entire land of Havilah, where there is gold.Genesis 2:12(The gold of that land is good; aromatic resin and onyx are also there.)Genesis 2:13The name of the second river is Gihon; it winds through the entire land of Cush.Genesis 2:14The name of the third river is Tigris; it runs along the east side of Ashur. And the fourth river is the Euphrates.