'Venomous' in the Bible

They shall take up venomous snakes, and if they drink any deadly poison it shall do them no harm whatever. They shall lay their hands on the sick, and the sick shall recover."

And when the barbarians saw the venomous beast hang on his hand, they said among themselves, No doubt this man is a murderer, whom, though he hath escaped the sea, yet vengeance suffereth not to live.