It was given me by an old Cherokee Indian medicine man who told me that as long as I wore it, people wouldn't ask me fool questions.
10 seconds sound clip from the El Dorado (1966) movie soundboard.
You can hear this line at 01:28:00 in the Blu-ray version of the movie.
Quote context
[...]
- What's your name? Joey. Josephine MacDonald.
- Hey, I know who you are. You're one of the ones who took him to the jail. Aren't you?
- Yes, ma'am. I'm one of them.
- Why do you wear that silly thing?
- Why?
- That wasn't a fool question.
- Well, then, I'll ask you one.
- Now, don't do that again, 'cause I can hit a little harder than you.
- Look, if you are who you say you are, I'm on your side.
[...]