We promise. After all, we're blood brothers.
5 seconds sound clip from the Shaolin prince movie soundboard.
You can hear this line at 01:18:00 in the DVD version of the movie.
Quote context
[...]
- If you have the royal seal, you must be the eldest Prince.
- Brother? So we are brothers. That's a relief.
- I want the two of you together to pledge, you will defeat the Ninth Prince.
- We promise. After all, we're blood brothers.
- I heard the Ninth Prince tell his men he couldn't find you here, to go to Shaolin.
- Be warned, Ninth Prince's orders.
- You have to hand over the two Princes to us now!
- We don't have any princes staying here. I can't see a Prince. Do you see a Prince anywhere?
[...]