'Wolves' in the Bible

“Beware of the false prophets, who come to you in sheep’s clothing, but inwardly are ravenous wolves.

“Behold, I send you out as sheep in the midst of wolves; so be shrewd as serpents and innocent as doves.

Go; behold, I send you out as lambs in the midst of wolves.

I know that after my departure savage wolves will come in among you, not sparing the flock;