Well, obviously, the Nazis are looking for the headpiece to the Staff of Ra and they think Abner's got it.
7 seconds sound clip from the Indiana Jones - Raiders of the Lost Ark movie soundboard.
You can hear this line at 00:18:45 in the Blu-ray version of the movie.
Quote context
[...]
- But he never found the city.
- Frankly, we're somewhat suspicious of Mr. Ravenwood.
- An American being mentioned so prominently in a secret Nazi cable.
- Oh, rubbish. Ravenwood's no Nazi.
- Well, what do the Nazis want him for, then?
- What exactly is a headpiece to the Staff of Ra?
- And it's capped with an elaborate headpiece in the shape of the sun, with a crystal in the center.
- And what you did was you take the staff to a special room in Tanis...
[...]