'Certainly' in the Bible

And Peter, being come to himself, said, Now I know certainly that the Lord has sent forth his angel and has taken me out of the hand of Herod and all the expectation of the people of the Jews.

And when the barbarians saw the beast hanging from his hand, they said to one another, This man is certainly a murderer, whom, though saved out of the sea, Nemesis has not allowed to live.