Luke 3:23
Now Jesus himself was about thirty years old when he began his ministry. He was the son, so it was thought, of Joseph, the son of Heli — about thirty years old marks the approximate age of public ministry. So it was thought (hōs enomizeto) is Luke's careful qualification: the genealogy that follows is the legal genealogy through Joseph. The reverse-direction genealogy that follows runs from Jesus through Joseph all the way to Adam.