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; for I had remained there with the kings of Persia.
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Hippolytus of Rome
AD 235
And lo, Michael. Who is Michael but the angel assigned to the people? As (God) says to Moses, I will not go with you in the way, because the people are stiff-necked; but my angel shall go with you.