Contra Faustum, Book XXIII
paragraph 9.We
believe that Mary, as well as Joseph, was of the
family of David, because we
believe the
Scriptures, which assert both that Christ was of the seed of
David after the flesh, and that His mother was the
Virgin Mary, He having no
human father.
- Faustus cannot pretend then I am unable to prove that Mary was of the family of David, as I have shown him unable to prove that she was not. I produce the strongest evidence from Scriptures of established authority, which declare that Christ was of the seed of David, and that He was born without a father of the Virgin Mary.
further on:
But even were I to admit this account, I should still contend that Joachim must have in some way belonged to the
family of David, and had somehow been adopted from the
tribe of Judah into that of Levi; or if not he, one of his ancestors; or, at least, that while born in the tribe of Levi, he had still some relation to the line of David; as Faustus himself acknowledges that Mary, though belonging to the tribe of Levi, could be given to a husband of the
tribe of Judah; and he expressly says that if Mary were Joseph’s daughter, the name Son of David would be applicable to
Christ. In this way, by the marriage of Joseph’s daughter in the tribe of Levi, her son, though born in the tribe of Levi, might not improperly be called the Son of David. And so, if the mother of that Joachim, who in the passage quoted by Faustus is called the father of
Mary, married in the tribe of Levi while she belonged to the
tribe of Judah and to the
family of David, there would thus be a sufficient reason for speaking of Joachim and Mary and Mary’s son as belonging to the seed of
David.
(the underlined is not to emphasize but to designate hyperlinks available in the Catholic encyclopedia from which I copied this material.)