Daniel 9:1

In the first year of Darius the son of Ahasuerus (Xerxes), of the lineage of the Medes. He was made king over the realm of the Chaldeans.

Daniel 11:1

I stood up to confirm and strengthen Darius the Mede in his first year.

Daniel 1:21

Daniel continued to the first year of king Cyrus.

Daniel 5:31-1

Darius the Mede received the kingdom. He was sixty-two years old.

Daniel 6:28

So Daniel prospered in the reign of Darius, and in 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
Daniel continued to the first year of king Cyrus.
Daniel 5:31
Darius the Mede received the kingdom. He was sixty-two years old.
Daniel 6:1
It pleased Darius to appoint a hundred and twenty governors over the kingdom. They were to be located throughout the whole kingdom.
Daniel 11:1
I stood up to confirm and strengthen Darius the Mede in his first year.