I repeat. When a waltz makes up his mind to sing, he's going to sing.
6 seconds sound clip from the Palooka (1934) movie soundboard.
You can hear this line at 00:54:35 in the Blu-ray version of the movie.
Quote context
[...]
- I'm Knobby Walsh, the champ's manager.
- Well, I told you a dozen times before you can't sing in here.
- Hey, when a waltz makes up his mind to sing, he's going to sing.
- I'll put the finger on you. I'll put you in a spot.
- I repeat. When a waltz makes up his mind to sing, he's going to sing.
- No.
- If he'd of got any tougher, I'd have murdered him.
[...]