Daniel 10:1, 12-14

In the third year of Cyrus king of Persia a message was revealed to Daniel, who was named Belteshazzar; and the message was true and it referred to great conflict (warfare, misery). And he understood the message and had an understanding of the vision. [Dan 8:26; Rev 19:9]

Then he said to me, “Do not be afraid, Daniel, for from the first day that you set your heart on understanding this and on humbling yourself before your God, your words were heard, and I have come in response to your words. But the prince of the kingdom of Persia was standing in opposition to me for twenty-one days. Then, behold, Michael, one of the chief [of the celestial] princes, came to help me, for I had been left there with the kings of Persia. Now I have come to make you understand what will happen to your people in the latter days, for the vision is in regard to the days yet to come.”