Since that time, although I kept the sword, I swore never to hurt anybody with it.

12 seconds sound clip from the 18 Jade Arhats (1978) movie soundboard.

You can hear this line at 01:05:01 in the DVD version of the movie.

Quote context

[...]

- I waited six hours. Not a sign.

- But you use a short sword.

- One time I was very fond of fighting duels. Used to seek-out well known swordsman.

- And one day a top fighter came to the town where I lived. He challenged me to a fight and I accepted.

- But still, although my fiancée asked me not to go... But on that night my fiancée killed herself. and she used this sword to do it.

- Since that time, although I kept the sword, I swore never to hurt anybody with it.

- As for Wang Chung-Wei...

- I invited him for a friendly contest, for a friendly test of skill, not to kill him.

- Well then, just who did kill him?

- I wouldn't know. But it happened near Wang's house. So why don't you make inquiries there?

[...]