I'm a friend of your mother's. I'd like to help you.
4 seconds sound clip from the The Exorcist movie soundboard.
You can hear this line at 01:24:26 in the Blu-ray version of the movie.
Quote context
[...]
- Jesus Christ, won't somebody help me?
- You don't see. You don't understand...
- Oh, God, can't you help her? Just help her!
- I'm a friend of your mother's. I'd like to help you.
- You might loosen these straps, then.
- I'm afraid you might hurt yourself, Regan.
[...]