- Mother, if I don't choke her before Saturday...
- It'd postpone the wedding, wouldn't it?
- It would not.

6 seconds sound clip from the The Philadelphia Story movie soundboard.

You can hear this line at 00:05:16 in the Blu-ray version of the movie.

Quote context

[...]

- Isn't George an angel?

- George is an angel.

- Is he handsome, or is he not?

- George is handsome.

- I like Dexter.

- Really? Why don't you postpone the wedding?

- How?

- Get smallpox.

- Don't put the idea in her head.

- George isn't usually late.

- He's waiting for us at the stables.

- Mother, if I don't choke her before Saturday...

- It'd postpone the wedding, wouldn't it?

- It would not.

- Be in the car when I get down.

- She's so mean about Dexter.

- He was rather mean to her, my dear.

- Did he really sock her?

- Please...

- But did he, really?

[...]