Now, don't explain. I believe you.
5 seconds sound clip from the The Big Knife (1955) movie soundboard.
You can hear this line at 01:36:52 in the Blu-ray version of the movie.
Quote context
[...]
- Well, what do you say? Can I get you something?
- Yeah, Nicko. Go run a bath for me. Good and hot. My back is stiff.
- Don't worry, I'll take care of that.
- That thing between you and Hank...
- Now, don't explain. I believe you.
- Well?
- Think I can list all the possible roads ahead?
- Don't bother. We won't silence that girl. It's become the cause of her life.
[...]