Luke 3:23 in the King James Version
And Jesus himself began to be about thirty years of age, being (as was supposed) the son of Joseph, which was the son of Heli,
Context
22 and the Holy Spirit descended in a bodily form like a dove on him; and a voice came out of the sky, saying “You are my beloved Son. In you I am well pleased.”
23 Jesus himself, when he began to teach, was about thirty years old, being the son (as was supposed) of Joseph, the son of Heli,
24 the son of Matthat, the son of Levi, the son of Melchi, the son of Jannai, the son of Joseph,