The Davidic covenant · 2 Samuel 7
Of the increase of his government there will be no end, on the throne of David (Isaiah 9:7; Luke 1:32–33).
In the days of Caesar Augustus' registration, Jesus was born in Bethlehem, the city of David, and laid in a manger; angels announced good news of great joy to shepherds (Luke 2:7-11). 4 BC.
1Now in those days a decree went out from Caesar Augustus that a census should be taken of the whole empire. 2This was the first census to take place while Quirinius was governor of Syria. 3And everyone went to his own town to register.
Of the increase of his government there will be no end, on the throne of David (Isaiah 9:7; Luke 1:32–33).
Matthew says that Jesus' conception and birth fulfilled Isaiah's words about the virgin who would bear a son called Immanuel.
Therefore the Lord Himself will give you a sign: Behold, the virgin will be with child and will give birth to a son, and will call Him Immanuel.
Isaiah 7:14 announces the sign, and Matthew 1:22-23 introduces the same words by saying that these events took place to fulfill what the Lord had spoken through the prophet.