- Look, your son is coming home.
- Lir? He's none of mine. I picked him up on a doorstep where some peasant had left him.

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

You can hear this line at 01:09:31.368 in the Blu-ray version of the movie.

Quote context

[...]

- I wonder what time it is.

- Well, of course you're of noble birth. Anybody can see that.

- I mean, you can't really be that ridiculous magician's niece. That's out of the question.

- Your majesty?

- Love is slowing you down, my lady. I will catch you at last if you love much more.

- Look, your son is coming home.

- Lir? He's none of mine. I picked him up on a doorstep where some peasant had left him.

- I was thinking that I had never been happy, and never had a son. It was pleasant at first, but it died quickly.

- There is only one thing that has ever made me happy.

- What is that?

- Do not mock me. I know very well what you have come for, and you know very well that I have them. Try to take them if you can, but do not mock me!

- My lord, in all your castle, in all your realm, there is nothing of yours that I desire. Good day, your majesty.

[...]