This is the name of the province that was west of the Euphrates River. It was across the river from the city of Susa. See how you translated it in [Esra 4:10](../04/09.md). (See: [[rc://en/ta/man/translate/translate-names]])
This can be translated in active form. AT: "for an official to send a letter to the king and for the king to send a letter back to them with a decree" (See: [[rc://en/ta/man/translate/figs-activepassive]])