Yes, the Grinch knew tomorrow all the Who girls and boys would wake bright and early, and rush for their toys.
10 seconds sound clip from the How the Grinch Stole Christmas (2000) movie soundboard.
You can hear this line at 00:59:37 in the Blu-ray version of the movie.
Quote context
[...]
- I quite enjoyed that. I hope I get another invite soon.
- Come on, come on! Good thing we have a spare.
- Suffering snorkelblatz! They're relentless!
- Only four hours till Christmas!
- And then, oh, the noise! Oh, the noise, noise, noise, noise!
- They'll bang on tong-tinglers. They'll blow their floo-flounders.
- They'll crash on jang-jinglers and bounce on boing-bounders!
- Then Whos young and old would sit down to a feast, and they'll feast and they'll feast.
- And they'll feast, feast, feast, feast!
[...]