David in the New Testament.
In the New Testament David is mentioned more often than any other character in Jewish history. He figures so largely not only because he is an ancestor of Jesus but also because he was seen as the ideal King and a man after God’s own heart.
The promises made to David find their fulfilment in Jesus.
v 4. Because Joseph was a descendant of King David, he had to go to Bethlehem in Judea, David’s ancient home. He travelled there from the village of Nazareth in Galilee. He took with him Mary, to whom he was engaged, who was now expecting a child.
We don’t hear a great deal about Joseph, Mary’s husband, but one thing stands out very clearly and the writers want it to be noted – he was a direct descendant of King David. All Jews regarded their ancestry as important, so for Joseph to count David as an ancestor was highly significant. On the occasion mentioned here, it was necessary for Joseph to travel from Nazareth to Bethlehem, his ancestral home, for the Roman census. That was quite a journey for his young, pregnant wife. (I wonder who it was in the Courts of Heaven that was delegated to fix the Roman census so that it coincided with the birth of Jesus and hence this trip from Nazareth to Bethlehem? After all, the Messiah had to be born in Bethlehem, so how else could it have been fixed!)
This link between David and Jesus was part of the authentication of Jesus as the Messiah. The promises made to David about a Kingdom and a King who would reign for ever appeared to have lapsed over the intervening years, but the birth, life, death and resurrection of Jesus signalled the arrival of a new, spiritual kingdom, open to all who would believe and follow Jesus. So all four Gospel writers refer to this link with David – it is one of the lynchpins in their stories of Jesus.