Oh, I'll know. I got ways of knowing. My personal friend, the Warlock taught me this. This here. I can see when they're sleeping and I know when they're awake.
14 seconds sound clip from the Santa Claus Is Comin' to Town (1970) movie soundboard.
You can hear this line at 00:29:29.857 in the Blu-ray version of the movie.
Quote context
[...]
- Jessica?
- Oh!
- I thought I'd never find you again. I wanted to bring you these.
- My goodness. You know if they're bad or good?
- Uh-huh. So you tell them to be good for goodness' sake.
- For what? For being so kind. For just being you.
- Golly!
- Now, about the toys, I'll have to kind of slip 'em in after dark when the Burgermeister is asleep.
- So you tell all the boys and girls to leave their doors unlocked tomorrow night.
[...]