There are rich sulfur beds in Sicily, not many kilometers from here at the base of mount Etna.

4 seconds sound clip from the 20 Million Miles to Earth (1957) movie soundboard.

You can hear this line at 00:47:06.600 in the Blu-ray version of the movie.

Quote context

[...]

- I hope when this is all over you'll let me try to make it up to you over a table for two in a dark cafe.

- With a candle burning on the table?

- And a bottle of wine.

- Bob. Bob Calder.

- Excuse me.

- Here's something, Bob.

- Sharman wrote that the basic diet of these creatures is sulfur, raw sulfur.

- I remember that much.

- There are rich sulfur beds in Sicily, not many kilometers from here at the base of mount Etna.

- We'll scour that mountain area as soon as it's light. If the creature's there, we'll recapture it.

- At that time I would consider it an honor to offer the facilities of the giardino zoological in Roma for its observation and examination.

- That will not be necessary, gentlemen.

- There is no longer time to recapture the monster alive

[...]