I've seen his eyes at the very word Comanche. I've seen him take his knife and... Never mind.
11 seconds sound clip from the The Searchers (1956) movie soundboard.
You can hear this line at 00:52:21 in the Blu-ray version of the movie.
Quote context
[...]
- But with all this trouble with Debbie and Ethan, I...
- I don't know what you can do about findin' Debbie that he can't.
- He'll find her now, Martin. Honest he will!
- That's what I'm afraid of, Laurie, him finding her!
- I've seen his eyes at the very word Comanche. I've seen him take his knife and... Never mind.
- He's a man that can go crazy wild! And I intend to be there to stop him, in case he does.
- I was hopin' I could hold you here, but I guess I knew better.
- Here, let me read it for you.
[...]