You should teach him to behave himself.

4 seconds sound clip from the Of Cooks And Kung Fu (1979) movie soundboard.

You can hear this line at 00:44:51 in the Blu-ray version of the movie.

Quote context

[...]

- Mister, what's the matter?

- And who the hell are you?

- He's my grandpa.

- Grandpa? You bastard. So you have to use your grandpa to protect you?

- If he's done wrong, please forgive him. I'll deal with him.

- What? Forgive this one? Do you hear that?

- Yeah, he's asking for it.

- I think he's a fool.

- You should teach him to behave himself.

- I'm sorry about this. He's a nuisance.

- I give you my word, he'll be punished.

- Well I'm not sure. Later is not good enough. I think we better do it ourselves right now.

- You must learn to fend for yourself.

[...]