That's what I do. It's what I live for. To help unfortunate merfolk, like yourself, poor souls with no one else to turn to.

15 seconds sound clip from the The Little Mermaid (1989) movie soundboard.

You can hear this line at 00:40:04 in the Blu-ray version of the movie.

Quote context

[...]

- Now, then, you're here because you have a thing for this human, this prince fellow. Not that I blame you. He is quite a catch, isn't he?

- Well, angelfish, the solution to your problem is simple.

- The only way to get what you want is to become a human yourself.

- Can you do that?

- My dear, sweet child.

- That's what I do. It's what I live for. To help unfortunate merfolk, like yourself, poor souls with no one else to turn to.

- I admit that in the past I've been a nasty. They weren't kidding when they called me, well, a witch.

- But you'll find that nowadays I've mended all my ways. Repented, seen the light and made a switch.

- True? Yes.

- And I fortunately know a little magic. It's a talent that I always have possessed.

[...]