Not partners. That's your first lesson. Cut your score in half, right down the middle. Worse than that, you take a partner, you put an apple on your head and hand the other guy a shotgun.

11 seconds sound clip from the The Grifters movie soundboard.

You can hear this line at 00:16:19 in the Blu-ray version of the movie.

Quote context

[...]

- Too young. Ya oughta be in school.

- I am in school.

- Five of spades. Five of spades. Where's the five?

- In your other hand.

- Good. You learned something. Goodbye.

- I wanna learn everything.

- Wanna be a grifter?

- Grifter? Yes.

- Not partners. That's your first lesson. Cut your score in half, right down the middle. Worse than that, you take a partner, you put an apple on your head and hand the other guy a shotgun.

- Grifters, ah? You're one, allright. Grifters got an irresistible urge to be the guy who's wise.

- There's nothing to whipping a fool. Hell, fools were made to be whipped.

- But to take another pro, even your partner, who knows you and has his eyes on you, that's a score. No matter what happens.

- You wanna learn a few tricks? I'll teach you a few tricks. But you hand does not get into my pocket.

- It's a deal.

[...]