Daniel 10:13

10:13 However, the prince of the kingdom of Persia was opposing me for twenty-one days. But Michael, one of the leading princes, came to help me, because I was left there with the kings of Persia.

Daniel 11:2

11:2 Now I will tell you the truth.

The Angel Gives a Message to Daniel

“Three more kings will arise for Persia. Then a fourth king will be unusually rich, more so than all who preceded him. When he has amassed power through his riches, he will stir up everyone against the kingdom of Greece.