Dimmer, darker, darker, dimmer, Rudolph's magic shall not glimmer.
11 seconds sound clip from the Rudolph and Frosty: Christmas in July movie soundboard.
You can hear this line at 00:16:08 in the Blu-ray version of the movie.
Quote context
[...]
- A red-nosed reindeer? So that's how Santa defeated my snow dragons.
- It will be a different story next Christmas Eve.
- A red-nosed reindeer is no match for King Winterbolt!
- What's happening, uncle Rudolph? What's wrong with your nose?
- Dimmer, darker, darker, dimmer, Rudolph's magic shall not glimmer.
- Dark and dim, dim and dark, now extinguish magic spark!
- It's all over. My nose is going. I feel awful.
- Rudolph, your nose just can't go out. Santa depends on it.
- You're right. I can't lose my nose. Unless... Unless...
[...]