Bob, I'm not going to argue with you about right or wrong, or duty or law.
6 seconds sound clip from the Dark Command (1940) movie soundboard.
You can hear this line at 00:41:10 in the Blu-ray version of the movie.
Quote context
[...]
- He'll have to stay in my custody.
- You'll sit there and calmly sentence my boy to death. You cannot do it.
- But he'll be safe. He'll get a fair trial.
- I want you to release my boy on bail!
- Please, dad. Let me speak to him.
- Bob, I'm not going to argue with you about right or wrong, or duty or law.
- I'm pleading with you for the life of my brother.
- I can't. It wouldn't be right.
- I don't care whether it's right or not!
- Doesn't it mean something to you that I'm asking you to do this for me?
[...]