The one who kills, protects himself first from being killed.
3.79 seconds sound clip from the The Green Jade Statuette (1977) movie soundboard.
You can hear this line at 00:32:42.167 in the DVD version of the movie.
Quote context
[...]
- And no one has ever managed to avoid my hidden knives.
- Someone told me, to watch out for your deadly technique of hand thrust.
- Ah you deserve your reputation for being this top killer, you're very careful.
- The one who kills, protects himself first from being killed.
- You're really no fool. Why did you get yourself involved in blackmailing Madame Pearl?
- Blackmail? I would never get myself involved in such a thing.
- You mean you didn't blackmail Madame Pearl for 50000 taels?
- If a man believes everything that a prostitute tells him, then he's really a damn fool.
[...]