KJV:
Behold, I send you forth as sheep in the midst of wolves: be ye therefore wise as serpents, and harmless as doves.
NASB:
"Behold, I send you out as sheep in the midst of wolves; so be shrewd as serpents and innocent as doves.
KJV:
For your obedience is come abroad unto all men. I am glad therefore on your behalf: but yet I would have you wise unto that which is good, and simple concerning evil.
NASB:
For the report of your obedience has reached to all; therefore I am rejoicing over you, but I want you to be wise in what is good and innocent in what is evil.
KJV:
That ye may be blameless and harmless, the sons of God, without rebuke, in the midst of a crooked and perverse nation, among whom ye shine as lights in the world;
NASB:
so that you will prove yourselves to be blameless and innocent, children of God above reproach in the midst of a crooked and perverse generation, among whom you appear as lights in the world,