Only he didn't know what the third one was on. Could have been an Appaloosa, 'cause he was looking right into the sun.
5 seconds sound clip from the Unforgiven movie soundboard.
You can hear this line at 01:36:46.559 in the Blu-ray version of the movie.
Quote context
[...]
- I was just doing some repairs up here.
- They killed one of them cowboys.
- And Parson said how he's seen three men, right after sunup, headed out east.
- And one was on a dun, and another was on a complete flea-bitten gray.
- Amos says to ask you if the county's gonna pay for feed for all the horses or not.
- Witherspoon says he won't sell us no more .30-30 shells without we pay.
- Hell, use my dogs! Then the county's gotta take responsibility.
[...]