Ezra 6:1

Then Darius the king made a decree To search the rolls in Babylon, where search was fairly made; but not finding the edict there, they searched in Achmetha, or Ecbatana, the royal city of the Medes and Persians, and found it there. As Darius, the better to fortify his title to the crown, had married two of the daughters of Cyrus, he thought himself concerned to do every thing which might tend to the honour of that great prince, and therefore more readily confirmed the decree which he had granted to the Jews.