You know what you have to do.
4 seconds sound clip from the Cruising movie soundboard.
You can hear this line at 01:18:43 in the Blu-ray version of the movie.
Quote context
[...]
- Well, if you get tired of studying, maybe I can get my old man to adopt you.
- Father, I need to talk to you. I wish just once you'd say something positive to me.
- I've tried to do everything you wanted, but it's never good enough.
- I've taken it for granted that you understood, Stuie.
- You know what you have to do.
- You know what you have to do. (2)
- I'm looking for Ted. I got the room next door.
- You must be the famous John Forbes.
- Yeah, looks as if I got back just in time.
[...]