Messiah to be heir to the throne of David

Old Testament Prophecy

Of the increase of His government and peace there will be no end, upon the throne of David and over His kingdom, to order it and establish it with judgment and justice from that time forward, even forever. The zeal of the LORD of hosts will perform this. Isaiah 9:7


New Testament Fulfillment

He will be great, and will be called the Son of the Highest; and the Lord God will give Him the thone of His father David. And He will reign over the house of Jacob forever, and of His kingdom there will be no end. Luke 1:32, 33