Dasher, Dancer, Prancer and Vixen... Donder and Blitzen.
5 seconds sound clip from the Desk Set (1957) movie soundboard.
You can hear this line at 00:59:59 in the Blu-ray version of the movie.
Quote context
[...]
- You ought to drink a little something for those hiccups.
- Hey, wait a minute. I may need that.
- Reference. Miss Watson. Merry Christmas.
- Dasher, Dancer, Prancer and Vixen... Donder and Blitzen.
- What do you suppose it'll be like here next Christmas when we're gone?
- Do you think EMMARAC will throw a party?
- Don't talk that way. It's bad luck to talk like that. It's Christmas!
[...]