They all say it was sudden. Dor Say was murdered and both Master Leung and Lord Chu were involved.
5 seconds sound clip from the The Shaolin Heroes (1980) movie soundboard.
You can hear this line at 00:34:18.040 in the Blu-ray version of the movie.
Quote context
[...]
- Cousin Leung, don't play innocent.
- But, brother, I am innocent.
- You say. I suspect both you and your father. And until it's proved otherwise, I ask you, leave here.
- Our fathers were both good friends.
- My father is dead. You are still alive.
- But, cousin, the past means something. Goodbye.
- If I ever find out that your father was involved, I will kill both of you.
- They all say it was sudden. Dor Say was murdered and both Master Leung and Lord Chu were involved.
- Don't thank me, maybe I'll take your life someday.
- Now listen, you take good care of yourself.
- The light sword is very important to the clan. Remember, your father protected it with his life.
- This sword will decide my life, I promise.
[...]