“No, no, don’t do that. If you shoot him, you’ll just make him mad.”
I first read a reference to that in one of Edgar Lee Masters' books.
A small man was threatening a much larger man with a .25 caliber. Larger man disdainfully says, "if you ever shoot me with that little thing and I find out about it - , I'm going to be mad"
Brooks stole it from Masters, I don't know who Masters might have stolen it from.