You'll do nothing of the sort.
4 seconds sound clip from the Ruggles of Red Gap (1935) movie soundboard.
You can hear this line at 01:11:10 in the Blu-ray version of the movie.
Quote context
[...]
- You didn't fire him again, did you?
- I looked all over town for him, everywhere.
- Oh, he couldn't desert me like this in my hour of need.
- Do you realise I don't even know how to introduce my guest of honour?
- There's the doorbell. They're arriving too early.
- You'll do nothing of the sort.
- I'll bet a dollar Lord Burnstead hasn't got his shirt on yet.
- Yeah, no, no, we can't. Maybe maybe we can't go downstairs at all.
- Um no. Beastly bores, receptions, aren't they? Tedious, I mean. I don't like 'em, do you?
- Well, they don't bother me none. No, I never go to 'em. I'm what they call agile.
- Agile? Oh! Oh, you you mean agile, huh?
[...]