'Kings' in the Bible

And you will come before rulers and kings because of me, for a witness to them and to the Gentiles.

But what went you out to see? a man delicately clothed? Those who have fair robes are in kings' houses.

He says, Yes. And when he came into the house, Jesus said to him, What is your opinion, Simon? from whom do the kings of the earth get payment or tax? from their sons or from other people?