Dantooine is too remote to make an effective demonstration, but don't worry.

6 seconds sound clip from the Star Wars: Episode IV - A New Hope (1977) movie soundboard.

You can hear this line at 00:58:43 in the Blu-ray version of the movie.

Quote context

[...]

- Where is the rebel base?

- Dantooine. They're on Dantooine.

- There. You see, Lord Vader? She can be reasonable.

- Continue with the operation. You may fire when ready.

- What?

- You're far too trusting.

- Dantooine is too remote to make an effective demonstration, but don't worry.

- We will deal with your rebel friends soon enough.

- No!

- Commence primary ignition.

(Large explosion)

[...]