- If he talks to me, I think he'll leave you. Do you want him to leave you?
- Yes.

8 seconds sound clip from the The Exorcist movie soundboard.

You can hear this line at 01:01:50 in the Blu-ray version of the movie.

Quote context

[...]

- Is there someone inside you?

- Sometimes.

- Who is it?

- I don't know.

- Is it Captain Howdy?

- I don't know.

- If I ask him to tell me, will you let him answer?

- No.

- Why not?

- I'm afraid.

- If he talks to me, I think he'll leave you. Do you want him to leave you?

- Yes.

- I'm speaking to the person inside of Regan now.

- If you are there, you, too, are hypnotized and must answer all my questions.

- Come forward... and answer me now.

(growling) (2)

[...]