- I see a horse. Just a white mare.
- I thought so. All right. It's a white mare.

10 seconds sound clip from the The Last Unicorn movie soundboard.

You can hear this line at 00:16:38.470 in the Blu-ray version of the movie.

Quote context

[...]

- Now just what in hell was that you stopped for?

- What do you think it is, Rukh? What do you see lying there?

- Dead horse.

- You're a fool! But I knew that.

- What about you, wizard? What do you see with your sorcerer's sight?

- Answer me, you juggler!

- I see a horse. Just a white mare.

- I thought so. All right. It's a white mare.

- I want her for the carnival. The last cage is empty.

- I need a rope.

- The rope that could hold that mare has not been woven. We'll make do with cold iron bars.

- Oh, she's waking!

- I'll put a sleep on her! Skagribbitch! Kastamangya! Nitchai! Nitchaul!

- Now cage her. She'll sleep till sunrise.

[...]