Matthew 10:16

Behold I send you forth as sheep into the midst of wolves: be ye therefore prudent as serpents, and innocent as doves.

Romans 16:18-19

and avoid them; for such people serve not our Lord Jesus Christ, but their own belly; and by a soothing address and good words deceive the hearts of the innocent.

Treasury of Scripture Knowledge

Summary

And with Absalom went two hundred men out of Jerusalem, that were called; and they went in their simplicity, and they knew not any thing.

Their simplicity

Bible References

Their simplicity

Matthew 10:16
Behold I send you forth as sheep into the midst of wolves: be ye therefore prudent as serpents, and innocent as doves.
Romans 16:18
and avoid them; for such people serve not our Lord Jesus Christ, but their own belly; and by a soothing address and good words deceive the hearts of the innocent.