It's late and he is still practicing.
4 seconds sound clip from the Martial Arts of Shaolin movie soundboard.
You can hear this line at 00:11:57 in the Blu-ray version of the movie.
Quote context
[...]
- It's late and he is still practicing.
- He doesn't seem to be practicing.
- Teacher! Teacher, are you ill?
- How do you know that? Are you spying on me?
- No, sir! We thought you're practicing.
- I was feeling a bit sick. Exercise helps.
[...]