On the barren plain of Zama there stood the invincible armies of the barbarian Hannibal.

14 seconds sound clip from the Gladiator (2000) movie soundboard.

You can hear this line at 01:31:11 in the Blu-ray version of the movie.

Quote context

[...]

(PLAYING FANFARE)

- Hail, mighty Caesar! Caesar! Caesar! Caesar! Caesar! Caesar! Caesar! Caesar! Caesar!

- We who are about to die salute you!

- On this day we reach back to hallowed antiquity to bring you a re-creation of the second fall of mighty Carthage!

(CROWD CHEERING) (2)

- On the barren plain of Zama there stood the invincible armies of the barbarian Hannibal.

- Ferocious mercenaries and warriors from all brute nations, bent on merciless destruction, conquest.

- Your emperor is pleased to give you the barbarian horde!

- Anyone here been in the army?

- Yes. I served with you at Vindobona.

- You can help me. Whatever comes out of these gates, we've got a better chance of survival if we work together.

[...]