I didn't know you were the Sundance Kid when I said you were cheatin'.
6 seconds sound clip from the Butch Cassidy and the Sundance Kid movie soundboard.
You can hear this line at 00:07:57 in the Blu-ray version of the movie.
Quote context
[...]
- That's just what I wanna hear.
- Every day you get older. Now, that's a law.
- I didn't know you were the Sundance Kid when I said you were cheatin'.
- If I draw on you, you'll kill me.
- No. You'd be killin' yourself.
- So why don't you just invite us to stick around? Now, you can do it. And easy. Come on. Come on.
- Thanks, but we gotta get goin'.
[...]