Daniel 10:18-21

Then the one (Gabriel) whose appearance was like that of a man touched me again, and he strengthened me. He said, “O man, highly regarded and greatly beloved, do not be afraid. Peace be to you; take courage and be strong.” Now when he had spoken to me, I was strengthened and said, “Let my lord speak, for you have strengthened me.” Then he said, “Do you understand [fully] why I came to you? Now I shall return to fight against the [hostile] prince of Persia; and when I have gone, behold, the prince of Greece is about to come. But I (Gabriel) will tell you what is inscribed in the writing of truth. There is no one who stands firmly with me and strengthens himself against these [hostile spirit forces] except Michael, your prince [the guardian of your nation].