You're absolutely sure it was the Penguin? All right. Keep an eye on him.
12 seconds sound clip from Batman (1966) - Hizzonner the Penguin (S2E17) TV Series.
You can hear this line at 00:01:27 in the Blu-ray version of the movie.
Quote context
[...]
- Take care of this poor old man.
- The Penguin did what? Floored a thug who was holding up a blind news dealer?
- Was polite to a police officer?
- Saved a baby in a buggy from being hit by a truck?
- And then donated $100,000 to the Gotham City Charity Fund?
- You're absolutely sure it was the Penguin? All right. Keep an eye on him.
- Did you hear all that, chief?
- Oh, that feathered fiend must be cooking up something pretty foul in his bubbling caldron.
- There's only one man capable of unraveling this tangled skein.
- Hark, is this a dagger which I see before me, the handle toward my hand?
[...]