Surely he told you there would be other interested parties.
6 seconds sound clip from the Indiana Jones - Raiders of the Lost Ark movie soundboard.
You can hear this line at 00:29:12 in the Blu-ray version of the movie.
Quote context
[...]
- We... We are... not thirsty.
- The same thing your friend Dr. Jones wanted.
- Surely he told you there would be other interested parties.
- I hope, for your sake, he has not yet acquired it.
- Why, are you willing to offer more?
[...]