Oh, but surely, sir, you'll take some nourishment. It's not conducive to good health to fight the forces of evil without proper supplies.

Alfred The Butler (Alan Napier)

9 seconds sound clip from Batman (1966) - Hot Off the Griddle (S2E3) TV Series.

You can hear this line at 00:11:13 in the Blu-ray version of the movie.

Quote context

[...]

- We haven't tested them yet, but we may have to use them eventually.

- Batman, you think of everything.

- Remember, the Boy Scouts motto?

- Be prepared.

- It would do well to keep that in mind at all times.

- I took the liberty, sir, of preparing you both a snack.

- How thoughtful, but we must be gone. Crime waits for no one.

- Oh, but surely, sir, you'll take some nourishment. It's not conducive to good health to fight the forces of evil without proper supplies.

- As they say, an army travels on its stomach.

- Indeed, sir. Uh, I anticipated your haste. I provided this sack.

- It's always been my motto: be prepared.

- Truer words were never spoken.

[...]