1 Faustus said: You apply to us the words of Paul: "Some shall depart from the faith, giving heed to lying spirits, and doctrines of devils; speaking lies in hypocrisy; having their consciences seared as with a hot iron; forbidding to marry, abstaining from meats, which God has created to be received with thanksgiving by believers." I refuse to admit that the apostle said this, unless you first acknowledge that Moses and the prophets taught doctrines of devils, and were the interpreters of a lying and malignant spirit; since they enjoin with great emphasis abstinence from swine's flesh and other meats, which they call unclean.
This case must first be settled; and you must consider long and carefully how their teaching is to be viewed: whether they said these things from God, or from the devil. As regards these matters, either Moses and the prophets must be condemned along with us; or we must be acquitted along with them. You are unjust in condemning us, as you do now, as followers of the doctrine of devils, because we require the priestly class to abstain from animal food; for we limit the prohibition to the priesthood, while you hold that your prophets, and Moses himself, who forbade all classes of men to eat the flesh of swine, and hares, and conies, besides all varieties of cuttle-fish, and all fish wanting scales, said this not in a lying spirit, nor in the doctrine of devils, but from God, and in the Holy Spirit.
Even supposing, then, that Paul said these words, you can convince me only by condemning Moses and the prophets; and so, though you will not do it for reason or truth, you will contradict Moses for the sake of your belly.
Source: Reply to Faustus the Manichaean (New Advent)