Genesis 2:10-14

A river flowed from the land of Eden, watering the garden and then dividing into four branches. The first branch, called the Pishon, flowed around the entire land of Havilah, where gold is found. The gold of that land is exceptionally pure; aromatic resin and onyx stone are also found there. The second branch, called the Gihon, flowed around the entire land of Cush. The third branch, called the Tigris, flowed east of the land of Asshur. The fourth branch is called the Euphrates.