They have not one brain among them. Except one. He is very clever. He's a French archeologist.
10 seconds sound clip from the Indiana Jones - Raiders of the Lost Ark movie soundboard.
You can hear this line at 00:35:18 in the Blu-ray version of the movie.
Quote context
[...]
- They hire only strong backs and they pay pennies for them.
- It's as if the pharaohs had returned.
- When did they find the map room?
- They have not one brain among them. Except one. He is very clever. He's a French archeologist.
[...]