And may the blackest curse of God strike you if you're lying.
5 seconds sound clip from the Anna Christie (1930) movie soundboard.
You can hear this line at 01:26:12 in the DVD version of the movie.
Quote context
[...]
- Give it to me. What do you want me to swear? You say it.
- Swear I'm the only man in the world ever you felt love for.
- I swear it. I swear it by God.
- And may the blackest curse of God strike you if you're lying.
- And may the blackest curse of God strike me if I'm lying.
- Oh, glory be to God, I'm after believing you now.
- No, why?
- Well, don't you believe me, Matt?
[...]