So you better write your letter now and mail it right away. Because he's getting ready with his reindeers and his sleigh.
11 seconds sound clip from the Santa Claus Is Comin' to Town (1970) movie soundboard.
You can hear this line at 00:01:33.173 in the Blu-ray version of the movie.
Quote context
[...]
- Why do you always come on Christmas Eve?
- Why do some people call you Kris Kringle? Why? Why? Why?
- Now, hold on, hold on. I can answer all your questions because I know everything about Santa.
- So you better watch out. You better not cry, you better not pout, I'm telling you why.
- You mean Santa was once a baby?
- Of course! Everybody's got to be a baby at least once in their lives.
- Now, this was years and years ago. Oh, way back.
- In one of the northern countries, there was a small city called Sombertown.
[...]