Thank you, Slartibartfast. That will be all!
3 seconds sound clip from The Hitchhiker's Guide to the Galaxy (1981) - Episode 4 sitcom.
You can hear this line at 00:24:06.665 in the Blu-ray version of the TV Series.
Quote context
[...]
- Try some grated Arcturan Megadonkey.
- Yes, thank you, Slartibartfast. You may go.
- What? Oh, very well... I'll go and get on with some of my fjords, then.
- Well, in fact, that won't be necessary. I don't think we'll be needing the new Earth any longer.
- What? I've got one thousand glaciers poised and ready to roll over Africa!
- Thank you, Slartibartfast. That will be all!
- Yes, sir. Thank you very much.
- Well... Goodbye, Earthman. Sorry about your planet. Hope the lifestyle comes together.
- I'm sorry, I thought you were proposing a toast.
[...]