But I'm warning you, I don't give up easily. Good night.

6 seconds sound clip from the Miracle on 34th Street (1947) movie soundboard.

You can hear this line at 00:30:28 in the Blu-ray version of the movie.

Quote context

[...]

- That's why I'm glad I'm here. Maybe I can do something about it.

- And I'm glad I met you and your daughter. You two are a test case for me.

- We are?

- Yes! You're sort of the whole thing in miniature.

- If I can win you over, there's still hope. If not, then I guess I'm through.

- But I'm warning you, I don't give up easily. Good night.

- Good night.

- Oh! Oh, Mr. Kringle. The first thing in the morning, would you report to Mr. Sawyer's office?

- Yes, he'll just give you a little examination. Oh, we do it with all our employees.

- A mental examination? Oh, I don't mind. I've taken dozens of them. Never failed one yet. Know them by heart.

[...]