- What sign, sir?
- The awakening of a tiny animal from his hibernation, his long winter's nap. I refer to a little groundhog.

13 seconds sound clip from the Jack Frost (1979) movie soundboard.

You can hear this line at 00:38:13 in the Blu-ray version of the movie.

Quote context

[...]

- Jack Frost whistled for more winter, but nothing came.

- But, sir, spring can't come early. I've got to keep that castle snowbound.

- Oh, please, sir, don't take winter away. Not yet.

- It's not up to me, Jack Frost. I take my orders from Nature.

- When she gives me a certain sign, I know it's my time to leave.

- What sign, sir?

- The awakening of a tiny animal from his hibernation, his long winter's nap. I refer to a little groundhog.

- At this very moment, he is starting to awaken. Very soon, he will leave his home.

- If he stays outside, and is not frightened by his shadow, that will be my sign to move on.

- But if his shadow frightens him?

- 6 more weeks of winter.

- Well, Jack Frost looked up and realized that the clouds hid the sun. There could never be a shadow that day. At least not a real shadow.

[...]