You'd better go. You're keeping Mr. Harrison.
5 seconds sound clip from the White Christmas (1954) movie soundboard.
You can hear this line at 01:40:50 in the Blu-ray version of the movie.
Quote context
[...]
- Just a second, Ed. I want to...
- Looks like I've got to scoot. Could I see you later tonight maybe?
- You'd better go. You're keeping Mr. Harrison.
- I don't know. I have to think about it.
- Think Phil will be able to keep the old man away from the television set?
- Hello.
[...]