10 This same doctrine of the Kingship of Christ which we have found in the Old Testament is even more clearly taught and confirmed in the New. The Archangel, announcing to the Virgin that she should bear a Son, says that "the Lord God shall give unto him the throne of David his father, and he shall reign in the house of Jacob for ever; and of his kingdom there shall be no end."
Source: Quas Primas (Vatican.va)