10 You have the impious audacity to accuse the God of the prophets of not fulfilling His promises even to His servants the Jews. Thou dost not mention, however, any promise that is unfulfilled; otherwise it might be shown, either that the promise has been fulfilled, and so that you do not understand it, or that it is yet to be fulfilled, and so that you do not believe it. What promise has been fulfilled to you, to make it probable that you will obtain new worlds gained from the region of darkness?
If there are prophets who predict the Manichæans with praise, and if it is said that the existence of the sect is a fulfillment of this prediction, it must first be proved that these predictions were not forged by Manichæus in order to gain followers. He does not consider falsehood sinful. If he declares in praise of Christ that He showed false marks of wounds in His body, he can have no scruple about showing false predictions in his sheepskin volumes. Assuredly there are predictions of the Manichæans, less clear in the prophets, and most explicit in the apostle.
For example: "The Spirit," he says, "speaks expressly, that in the last times some shall depart from the faith, giving heed to seducing spirits, and to doctrines of devils, speaking lies in hypocrisy, having their conscience seared, forbidding to marry, abstaining from meats, which God has created to be received with thanksgiving by believers, and those who know the truth. For every creature of God is good, and nothing to be refused, if it be received with thanksgiving." The fulfillment of this in the Manichæans is as clear as day to all that know them, and has already been proved as fully as time permits.
Source: Reply to Faustus the Manichaean (New Advent)