Ezra 4:5-6

4:5 They were hiring advisers to oppose them, so as to frustrate their plans, throughout the time of King Cyrus of Persia until the reign of King Darius of Persia.

Official Complaints Are Lodged Against the Jews

4:6 At the beginning of the reign of Ahasuerus they filed an accusation against the inhabitants of Judah and Jerusalem.