- How did you happen to call him Harvey?
- Harvey's his name.
- How do you know that?

6 seconds sound clip from the Harvey (1950) movie soundboard.

You can hear this line at 01:13:32.491 in the Blu-ray version of the movie.

Quote context

[...]

- Their hopes and their regrets, their loves and their hates, all very large because nobody ever brings anything small into a bar.

- And then I introduce them to Harvey. And he's bigger and grander than anything they offer me.

- And... And when they leave, they leave impressed.

- The same people seldom come back, but that's... That's envy, my dear.

- There's a little bit of envy in the best of us. And that's too bad, isn't it?

- How did you happen to call him Harvey?

- Harvey's his name.

- How do you know that?

- There was a rather interesting coincidence on that, Doctor.

- One night, several years ago, I was walking early in the evening down along Fairfax Street. It was between 18th and 19th. I... Do you know the block?

- Yes, yes.

- I'd just put Ed Hickey into a taxi. Ed had been mixing his rye with his gin, and he... I just felt that he needed conveying.

- Well, anyway, I was walking down along the street and I heard this voice saying: Good evening, Mr. Dowd. Well, I turned around and here was this big six-foot rabbit, leaning up against a lamppost.

[...]