Daniel 10:19-20

And he said, “O man greatly beloved, fear not! Peace be to you; be strong, yes, be strong!” So when he spoke to me I was strengthened, and said, “Let my lord speak, for you have strengthened me.” Then he said, “Do you know why I have come to you? And now I must return to fight with the prince of Persia; and when I have gone forth, indeed the prince of Greece will come.