Faustus repels the insinuation that the prophecy of Paul with reference to those that should forbid to marry, abstain from meats, etc., applies to the Manichæans more than to the Catholic ascetics, who are held in the highest esteem in the Church. Augustine justifies this application of the prophecy, and shows the difference between Manichæan and Christian asceticism.
Source: Reply to Faustus the Manichaean (New Advent)