So I suspected.
4 seconds sound clip from the Beat the Devil (1953) movie soundboard.
You can hear this line at 00:29:58 in the Blu-ray version of the movie.
Quote context
[...]
- I'm surprised you know about them at all. Very few people do. They prefer to work behind the scenes.
- You're very quick, aren't you?
- In point of fact, he has a very special reason.
- Sin?
- Since the war, my husband has been almost exclusively concerned with spiritual values.
- He wants to work out the problem of sin.
[...]