Matthew 10:16-17

"Behold, it is I who am sending you forth like sheep among wolves. Be then as serpents and as guileless as doves.

Romans 3:8

And why not say (as I myself am slanderously reported to say), "Let us do evil that good may come out of it"? Such arguments are rightly condemned.

Treasury of Scripture Knowledge

Summary

But Gedaliah the son of Ahikam said unto Johanan the son of Kareah, Thou shalt not do this thing: for thou speakest falsely of Ishmael.

Bible References

Thou shalt

Matthew 10:16
"Behold, it is I who am sending you forth like sheep among wolves. Be then as serpents and as guileless as doves.
Romans 3:8
And why not say (as I myself am slanderously reported to say), "Let us do evil that good may come out of it"? Such arguments are rightly condemned.