I am a Greek, as you did call me, taking arms against a Greek.
5 seconds sound clip from the Alexander the Great (1956) movie soundboard.
You can hear this line at 01:16:24 in the Blu-ray version of the movie.
Quote context
[...]
- Greek or Persian, a man's roots are a man's roots.
- Is there also a doubt here of my loyalty?
- My lords, let me speak bluntly.
- I am a Greek, as you did call me, taking arms against a Greek.
- This is not a game for me or for my men. We have to win, as do you.
- This is a professional army we face.
- You spoke bluntly, now I will.
- These lands you speak of burning are ours. The crops are ours.
[...]