One of 882 identical pieces they delivered in a stone chest to Cortés himself.
9 seconds sound clip from the Pirates of the Caribbean 1: The Curse of the Black Pearl movie soundboard.
You can hear this line at 00:56:07 in the Blu-ray version of the movie.
Quote context
[...]
- There would be no sense to be killing you.
- Then release me. You have your trinket. I'm of no further value to you.
- You don't know what this is, do you?
- One of 882 identical pieces they delivered in a stone chest to Cortés himself.
- Blood money paid to stem the slaughter he wreaked upon them with his armies.
- But the greed of Cortés was insatiable.
- So the heathen gods placed upon the gold a terrible curse.
- Any mortal that removes but a single piece from that stone chest shall be punished for eternity.
[...]