And the name of the third river is Tigris: that is it which goes toward the east of Assyria. And the fourth river is Euphrates.
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Ephrem The Syrian
AD 373
Now these four rivers are as follows: the Pishon, that is, the Danube; the Gihon, that is, the Nile; the Tigris and the Euphrates. In between these we live. Even though the regions from which these flow are known, this does not apply to the head of the source; for Paradise is situated on a great height, and the rivers are swallowed up under the surrounding sea, descending as it were down a tall water pipe; having passed through the ground beneath the sea and reached this earth, the earth then spouts forth with one of them in the West-the Danube, or Pishon-the Gihon in the South, and the Euphrates and Tigris in the North.
