This is not the real sword, it's still at the Ming palace.
3 seconds sound clip from the The Shaolin Heroes (1980) movie soundboard.
You can hear this line at 01:25:28.757 in the Blu-ray version of the movie.
Quote context
[...]
- Hm! I gave you a chance and you refused.
(fighter imitating chicken clucking) (4)
- Now wait! I think it would be much more appropriate to kill him with the light sword.
- This is not the real sword, it's still at the Ming palace.
- So you see, it's you who've fallen into the trap.
- Master Leung, you're not really wounded. I know you too well. It's just a pretense, isn't it?
- It'll do you no good. Huh, I promise you.
[...]