Daniel 8:27

8:27 I, Daniel, was exhausted and sick for days. Then I got up and again carried out the king’s business. But I was astonished at the vision, and there was no one to explain it.

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.