I won't say anything about the other thing, because I think it's beneath dignity to notice it...
6 seconds sound clip from the The Skin Game (1931) movie soundboard.
You can hear this line at 00:17:07 in the Blu-ray version of the movie.
Quote context
[...]
- Well... you should hear both sides before you say that, missy.
- There isn't another side to turning out the Jackmans after you promised...
- I had been standing up for you. Now I won't.
- Oh, dear, dear. What'll become of me, eh?
- I won't say anything about the other thing, because I think it's beneath dignity to notice it...
- But to turn poor people out of their cottage is a shame.
- Well, what's the good? Life's too short for rows.
- I'll answer to god for my actions, not to you, young lady.
[...]