'Authority' in the Bible

Who puts himself against all authority, lifting himself up over all which is named God or is given worship; so that he takes his seat in the Temple of God, putting himself forward as God.

For the mystery of lawlessness [rebellion against divine authority and the coming reign of lawlessness] is already at work; [but it is restrained] only until he who now restrains it is taken out of the way.

Now we command you, believers, in the name of our Lord Jesus Christ and by His authority, that you withdraw and keep away from every brother or sister who leads an undisciplined life and does not live in accordance with the tradition and teaching that you have received from us.

not because we have not authority, but that ourselves a pattern we might give to you, to imitate us;

To persons of that sort our injunction--and our command by the authority of the Lord Jesus Christ--is that they are to work quietly and eat their own honestly-earned bread.