I dont fully understand you question... I do believe the answer you're looking for is The Persian Gulf :)
The Tigris and Euphrates Rivers flow into the Persian Gulf.
the Persian gulf is were the Tigris and the Euphrates rivers flow into.
The Tigris and Euphrates rivers flow into the Persian gulf
the Persian gulf is were the Tigris and the Euphrates rivers flow into.
Those two rivers are the Euphrates and Tigris.
The Tigris and Euphrates flow into the Persian Gulf.
Both the Tigris and Euphrates flow into the gulf.
The Tigris and Euphrates flow into the Persian Gulf.
The Tigris and Euphrates rivers flow from the mountains of present day Turkey into the Persian Gulf.
The Tigris River is further east than the Euphrates River.
They flow into the Persian Gulf
The Tigris and Euphrates rivers.