Library Hippolytus Refutation of All Heresies
Book 10, Chapter 21: The Phrygians or Montanists.
The Phrygians, however, derive the principles of their heresy from a certain Montanus, and Priscilla, and Maximilla, and regard these wretched women as prophetesses, and Montanus as a prophet. In respect, however, of what appertains to the origin and creation of the universe, the Phrygians are supposed to express themselves correctly; while in the tenets which they enunciate respecting Christ, they have not irrelevantly formed their opinions. But they are seduced into error in common with the heretics previously alluded to, and devote their attention to the discourses of these above the Gospels, thus laying down regulations concerning novel and strange fasts.
English translation by J.H. MacMahon, in Ante-Nicene Fathers, Vol. V (eds. Alexander Roberts and James Donaldson; Buffalo: Christian Literature Publishing Co., 1886). Public domain. Digital text via New Advent Church Fathers.