But when Li Hao died, then for the first time, I felt it prick my conscience.

8 seconds sound clip from the Five Deadly Venoms movie soundboard.

You can hear this line at 01:22:35 in the Blu-ray version of the movie.

Quote context

[...]

- Don't you worry about him.

- Is that because you've already found him? That's why you don't need Zhang and don't need me.

- If you want to think that, go ahead.

- I came from a wealthy family. I joined the clan because I wanted to learn a special kung fu. To be a real expert. But in actual fact, I've just become a killer.

- Killing, that's all I know. Death, every day, another.

- But when Li Hao died, then for the first time, I felt it prick my conscience.

- And then to hide that one, we killed again!

- First Men Fua, and then Lin Kuang.

- You just asked me when will it end. And let me tell you, once an evil deed is done, then it never ends, it goes on. And it goes on forever.

- Is this place where you do your training?

[...]