Then, at an appointed time, Baron Harkonnen will return to Arrakis and launch a sneak attack on Duke Atreides.
10 seconds sound clip from the Dune (1984) movie soundboard.
You can hear this line at 00:14:50 in the Blu-ray version of the movie.
Quote context
[...]
- The Duke is becoming more popular in the Landsraad.
- The Duke will not refuse because of the tremendous power they think they will gain.
- I have promised the Baron five legions of my Sardaukar terror troops.
- So the Harkonnens will rid you of House Atreides.
- Yes. (3)
- Listen to me. The spice must flow.
- The spice has given me accelerated evolution for 4000 years. It has enabled you to live 200.
[...]