Ezra 5:5-6

But the eye of their God was upon the elders of the Jews, so that they could not make them cease till a report could go to Darius. Then a written answer was returned concerning this matter. This is a copy of the letter that Tattenai sent: The governor of the region beyond the River, and Shethar-Boznai, and his companions, the Persians who were in the region beyond the River, to Darius the king.