'Beyond the River' in the Bible

And I said to the king, If it please the king, let letters be given me to the governors Beyond the River, so that they may let me pass through until I come to Judah,

And I came to the governors of the province Beyond the River and gave them the king's letters. And the king had sent captains of the army and horsemen with me.

And next to them Melatiah of Gibeon repaired, and Jadon of Meron, the men of Gibeon and of Mizpah, to the throne of the governor Beyond the River.