Ezra 5:5

5:5 But God was watching over the elders of Judah, and they were not stopped until a report could be dispatched to Darius and a letter could be sent back concerning this.

Ezra 6:1

Darius Issues a Decree

6:1 So Darius the king issued orders, and they searched in the archives of the treasury which were deposited there in Babylon.

Haggai 1:15

1:15 This took place on the twenty-fourth day of the sixth month of King Darius’ second year.