I had to make you prove it the hard way, to ever really know.
5 seconds sound clip from the Dead Reckoning (1947) movie soundboard.
You can hear this line at 01:17:42.124 in the Blu-ray version of the movie.
Quote context
[...]
- Larry? May I have police headquarters, please?
- The chief, I guess. I'd better speak to the chief.
- Yes, who is it? Hello? Who did you say you were? Hello?
- I had to make you prove it the hard way, to ever really know.
- A few minutes ago, I didn't dare do this. Now I can, Mike. I'm doing it so that you know I can.
- I never thought it could happen. I've been waiting so long for things to be like this.
- I lived by the train tracks. I was a carhop in Texas, a cigarette girl in a... Guys getting fresh.
- And then I sang, and when Stuart Chandler came along, I thought...
[...]