Well, I happen to know for a fact that Santa Claus is real. And in the next couple of days somehow I'm gonna prove it to you.
11 seconds sound clip from the Christmas Vacation (1989) movie soundboard.
You can hear this line at 00:55:59 in the Blu-ray version of the movie.
Quote context
[...]
- Him's nervous because he don't know if he's getting nothing.
- I don't think he should be nervous and you shouldn't be either.
- If you've been good all year round, Santa is gonna bring you something.
- You know, every year he comes to our house. I've seen him.
- So. It's good idea you came to stay with us, isn't it?
- I think you'd better go back to bed now.
[...]