6 It is remarkable how, amid his wild irrelevancies, this wretched trifler loses no available opportunity of darkening the declarations of Scripture by the fabulous creations of his own fancy. Thus he says of Abraham, that when he took his handmaid to wife he disbelieved God's promise that he should have a child by Sarah; whereas, in fact, this promise had not at that time been given. Then he accuses Abraham of falsehood in calling Sarah his sister, not having read what may be learned on the authority of Scripture about the family of Sarah.
Abraham's son Isaac also he accuses of falsely calling his wife his sister, though a distinct account is given of her family. Then he accuses Jacob of there being a daily quarrel among his four wives, which should be the first to appropriate him on his return from the field, while nothing of this is said in Scripture. And this is the man who pretends to hate the writers of the sacred books for their falsehood, and who has the effrontery so to misrepresent even the gospel record, though its authority is admitted by all as possessing the most abundant confirmation, as to try to make it appear, not indeed that Matthew himself—for in that case he would have been forced to yield to apostolic authority—but that some one under the name of Matthew, has written about Christ what he refuses to believe, and attempts to refute with a contumelious ingenuity!
Source: Reply to Faustus the Manichaean (New Advent)