8 Let the Cataphrygians also be your abhorrence, and Montanus, their ringleader in evil, and his two so-called prophetesses, Maximilla and Priscilla. For this Montanus, who was out of his mind and really mad (for he would not have said such things, had he not been mad), dared to say that he was himself the Holy Ghost—he, miserable man, and filled with all uncleanness and lasciviousness; for it suffices but to hint at this, out of respect for the women who are present. And having taken possession of Pepuza, a very small hamlet of Phrygia, he falsely named it Jerusalem; and cutting the throats of wretched little children, and chopping them up into unholy food, for the purpose of their so-called mysteries —(wherefore till but lately in the time of persecution we were suspected of doing this, because these Montanists were called, falsely indeed, by the common name of Christians;)— yet he dared to call himself the Holy Ghost, filled as he was with all impiety and inhuman cruelty, and condemned by an irrevocable sentence.
Source: Catechetical Lectures (New Advent)