Daniel 10:12-13

Then said he unto me, Fear not, Daniel; for from the first day that thou didst set thy heart to understand, and to humble thyself before thy God, thy words were heard: and I am come for thy words’ sake. But the prince of the kingdom of Persia withstood me one and twenty days; but, lo, Michael, one of the chief princes, came to help me: and I remained there with the kings of Persia.