24 But the Jews are much troubled at these things. This also Isaiah foreknew, saying, And they shall wish that they had been burnt with fire: for unto us a child is born (not unto them), unto us a Son is given. Mark thou that at first He was the Son of God, then was given to us. And a little after he says, And of His peace there is no bound. The Romans have bounds: of the kingdom of the Son of God there is no bound. The Persians and the Medes have bounds, but the Son has no bound. Then next, upon the throne of David, and upon his kingdom to order it. The Holy Virgin, therefore, is from David.
Source: Catechetical Lectures (New Advent)