Your wife is Japanese, and so any challenge to her, is a challenge to us, as well.
7 seconds sound clip from the Heroes of the East (1978) movie soundboard.
You can hear this line at 00:49:16.380 in the DVD version of the movie.
Quote context
[...]
- This gentleman is a famous Japanese teacher, and he taught me the secrets of Ninjitsu.
- These men are some of the best fighters in Japan. We've come here to accept the challenge you made.
- Challenge? But I never challenged you men, though. You've made a mistake.
- This letter, you wrote it, didn't you?
- Yes. That's a letter I wrote my wife. How'd you get it?
- Your wife is Japanese, and so any challenge to her, is a challenge to us, as well.
- As from now on, she is no longer your wife.
- He's our top Kendo fighter. I hear you're good with a sword, too. Why don't you fight him?
[...]