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 10:16

10:16 Then one who appeared to be a human being was touching my lips. I opened my mouth and started to speak, saying to the one who was standing before me, “Sir, due to the vision, anxiety has gripped me and I have no strength.