Daniel 10:12-13

Then the man said to me, “Daniel, do not be afraid. Some time ago you decided to get understanding and to humble yourself before your God. Since that time God has listened to you, and I have come because of your prayers. But the prince of Persia has been fighting against me for twenty-one days. Then Michael, one of the most important angels, came to help me, because I had been left there with the king of Persia.