If he's up to something, you'll be placing yourself in danger.
2 seconds sound clip from the The Mummy (1959) movie soundboard.
You can hear this line at 01:07:15.267 in the Blu-ray version of the movie.
Quote context
[...]
- So the locals say. Though it's my belief they wouldn't know an Egyptian from a Chinese acrobat.
- But what's an Egyptian doing here?
- Don't you know anything about him?
- Nothing. I don't even know if he's really Egyptian.
- No doubt, but you're not going to.
- This must tie up. It's too great a coincidence.
- If he's up to something, you'll be placing yourself in danger.
- It's my duty to warn you not to take any action yet.
- It'll take a little time, but I'll find out about him eventually.
[...]