This sounds like Patton, Field Marshal.
5 seconds sound clip from the Patton (1970) movie soundboard.
You can hear this line at 02:05:05 in the Blu-ray version of the movie.
Quote context
[...]
- He what? Why, that dirty son of a...
- I'm sorry, I'm sorry. I promised to keep my mouth shut.
- What's this activity near Coutances?
- Enemy armored forces driving through our defenses at Lessay.
- American tanks moving rapidly, slicing through to the rear areas.
- This sounds like Patton, Field Marshal.
- The Fuhrer says that the Fifteenth Army is not to be moved to Normandy.
[...]