Sin's family say they have reliable witnesses, who swear that your father was there.

5 seconds sound clip from the The Shaolin Heroes (1980) movie soundboard.

You can hear this line at 00:25:58.390 in the Blu-ray version of the movie.

Quote context

[...]

- I know that Sin wants you to be dead.

- Impossible!

- Lord Sin died very suddenly. What's more, under quite mysterious circumstances.

- It's said your father and Lord Chu were at the scene of his death.

- It's not true, it couldn't be, they were old friends.

- Then who was it then?

- Sin's family say they have reliable witnesses, who swear that your father was there.

- What's more, your father's being held prisoner at this very moment.

- What's that? Where?

- In a hut near the central house.

- What? Listen and listen well. If you lie, I'll return, just to kill you. Now you better be honest with me.

- Dad!

- Son, son!

- Stay where you are, or I'll kill him!

[...]