Take them to the desert, as the traitor suggested.
6 seconds sound clip from the Dune (1984) movie soundboard.
You can hear this line at 01:35:27 in the Blu-ray version of the movie.
Quote context
[...]
- Get up.
- I leave them in your hands, Piter.
- Goodbye, Jessica. And goodbye to your sweet son.
- We were ordered to kill them. So kill them!
- What are your orders, Piter?
- Take them to the desert, as the traitor suggested.
- The worms will destroy the evidence.
- Their bodies must never be found.
- I was the one who broke his Imperial conditioning.
- I've thought of many pleasures with you.
[...]