Now, O king, establish the decree, and sign the writing, that it be not changed, according to the law of the Medes and Persians, which alters not.
All Commentaries on Daniel 6:8 Go To Daniel 6
Jerome
AD 420
It is perfectly evident, as we have remarked above, that there was only one kingdom of the Medes and Persians both, under the rule of Darius and Cyrus.