'With Authority' in the Bible

And they were all amazed, so as to question among themselves, saying, What is this? What is this new doctrine, that he commands with authority, and the unclean spirits also obey him?

and they were astonished at his teaching, for his word was with authority.

And amazement developed in all, and they spoke among each other, saying, What is this word? Because with authority and power he commands the unclean spirits, and they come out.