וְשֵׁ֨ם הַנָּהָ֤ר הַשְּׁלִישִׁי֙ חִדֶּ֔קֶל ה֥וּא הַֽהֹלֵ֖ךְ קִדְמַ֣ת אַשּׁ֑וּר וְהַנָּהָ֥ר הָֽרְבִיעִ֖י ה֥וּא פְרָֽת׃
And the name of the third river is Tigris; that is it which goeth toward the east of Asshur. And the fourth river is the Euphrates.
Targum Jonathan on Genesis
And the name of the third river is Diglath; that is it which goeth to the east of Athoor. And the fourth river is Pherath.