Daniel 9:1

In one year to Darius son of Ahasuerus, from the seed of Media who reigned over the kingdom of the Chaldeans.

Daniel 11:1

And I in the one year to Darius the Mede, standing to make firm and to strengthen for him.

Daniel 1:21

And Daniel will be even to one year to Cyrus the king.

Daniel 5:31-1

And Darius the Median received the kingdom, as the son of two and sixty years.

Daniel 6:28

And this Daniel was prospered in the kingdom of Darius, and in the kingdom of Cyrus the Persian.

Treasury of Scripture Knowledge

Summary

In the first year of Darius the son of Ahasuerus, of the seed of the Medes, which was made king over the realm of the Chaldeans;

Bible References

Darius

Daniel 1:21
And Daniel will be even to one year to Cyrus the king.
Daniel 5:31
And Darius the Median received the kingdom, as the son of two and sixty years.
Daniel 6:1
It pleased before Darius and he set up over the kingdom a hundred and twenty satraps, whom to be over all the kingdom;
Daniel 11:1
And I in the one year to Darius the Mede, standing to make firm and to strengthen for him.