Anf-01 ix.iv.xxii Pg 19
Luke i. 42.
the Holy Ghost pointing out to those willing to hear, that the promise which God had made, of raising up a King from the fruit of [David’s] belly, was fulfilled in the birth from the Virgin, that is, from Mary. Let those, therefore, who alter the passage of Isaiah thus, “Behold, a young woman shall conceive,” and who will have Him to be Joseph’s son, also alter the form of the promise which was given to David, when God promised him to raise up, from the fruit of his belly, the horn of Christ the King. But they did not understand, otherwise they would have presumed to alter even this passage also.