You can't do that! It belongs to the Fire Department.
5 seconds sound clip from the A King in New York (1957) movie soundboard.
You can hear this line at 01:36:03 in the Blu-ray version of the movie.
Quote context
[...]
- Haven't you two solved that problem yet?
- Oh, here we go again. You're going to have to take another ride.
- We'll take the hose with us.
- You can't do that! It belongs to the Fire Department.
- What do you expect us to do? Ride up and down all day?
[...]