Matthew 10:16 in the King James Version
Behold, I send you forth as sheep in the midst of wolves: be ye therefore wise as serpents, and harmless as doves.
Context
15 Most certainly I tell you, it will be more tolerable for the land of Sodom and Gomorrah in the day of judgment than for that city.
16 “Behold, I send you out as sheep among wolves. Therefore be wise as serpents and harmless as doves.
17 But beware of men, for they will deliver you up to councils, and in their synagogues they will scourge you.