Oh, I know it seems absurd when we've known each other such a short time, but I'm serious.
5 seconds sound clip from the The Mummy (1932) movie soundboard.
You can hear this line at 00:30:58.920 in the Blu-ray version of the movie.
Quote context
[...]
- Looks like an attempted theft, but nothing stolen here could be disposed of.
- Let me put this here. You'll be more comfortable.
- Thanks.
- You really want to know why I didn't take you to the hospital? Because when I held you in my arms...
- Oh, I know it seems absurd when we've known each other such a short time, but I'm serious.
- But I've never been serious about this sort of thing before.
- Now, look here. You can tell me to go to the devil, but you can't laugh at me.
- The curse has struck her, and now, through her, it will strike my son.
- Quiet. Frank, will you come to your father's study?
[...]