Matthew 10:16

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

Romans 16:18-19

For such are not servants to our Lord Jesus Christ, but to their own belly; and by smooth speeches and flattering commendations deceive the hearts of the guileless.

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 in the midst of wolves: be ye therefore prudent as serpents, and harmless as doves.
Romans 16:18
For such are not servants to our Lord Jesus Christ, but to their own belly; and by smooth speeches and flattering commendations deceive the hearts of the guileless.