Romans 1:3

3 regarding his Son, who as to his earthly lifea was a descendant of David,

Read Romans 1:3 Using Other Translations

Concerning his Son Jesus Christ our Lord, which was made of the seed of David according to the flesh;
concerning his Son, who was descended from Davidaccording to the flesh
The Good News is about his Son. In his earthly life he was born into King David’s family line,