Genesis 2:10-14

10Now a river flowed out of Eden to water the garden, and from there it branched into four headwaters:

11The name of the first river is the Pishon; it winds through the whole land of Havilah, where there is gold. 12And the gold of that land is pure, and bdellium and onyx are found there. 13The name of the second river is the Gihon; it winds through the whole land of Cush. 14The name of the third river is the Tigris; it runs along the east side of Assyria. And the fourth river is the Euphrates.