Right. The busier the better.
3 seconds sound clip from the Forbidden Planet (1956) movie soundboard.
You can hear this line at 01:18:55 in the Blu-ray version of the movie.
Quote context
[...]
- My darling, I'm completely helpless as long as he remains here so willfully.
- Get those graves dug. Keep the men busy.
- Right. The busier the better.
- Well, men, whatever it was, our main battery stopped it.
[...]