Daniel 9:1

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

Daniel 11:1

And in the first year of Darius the Mede, I stood to encourage and to strengthen him.

Daniel 1:21

And Daniel continued even unto the first year of King Cyrus.

Daniel 5:31-1

And Darius the Median took the kingdom, being sixty-two years old.

Daniel 6:28

So this Daniel was prospered during the reign of Darius and during the reign 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 continued even unto the first year of King Cyrus.
Daniel 5:31
And Darius the Median took the kingdom, being sixty-two years old.
Daniel 6:1
It pleased Darius to set over the kingdom one hundred and twenty governors who should be in all the kingdom;
Daniel 11:1
And in the first year of Darius the Mede, I stood to encourage and to strengthen him.