Matthew 1:23

Isaiah 7:14 NIV
Therefore the Lord himself will give you a sign: The virgin will conceive and give birth to a son, and will call him Immanuel.

Isaiah 9:6-7 NIV
For to us a child is born, to us a son is given, and the government will be on his shoulders. And he will be called Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace. Of the greatness of his government and peace there will be no end. He will reign on David’s throne and over his kingdom, establishing and upholding it with justice and righteousness from that time on and forever. The zeal of the Lord Almighty will accomplish this.

Romans 1:3-4 NIV
regarding his Son, who as to his earthly life was a descendant of David, and who through the Spirit of holiness was appointed the Son of God in power by his resurrection from the dead: Jesus Christ our Lord.