'Wolves' in the Bible

"Beware of false prophets who come to you in sheep's clothing but inwardly are savage wolves.

"Pay attention, now! I am sending you out like sheep among wolves. So be as cunning as serpents and as innocent as doves.

Get going! See, I am sending you out like lambs among wolves.

I know that when I'm gone, savage wolves will come among you and not spare the flock.