Tough.

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

You can hear this line at 00:08:52 in the DVD version of the movie.

Quote context

[...]

- Where are you going?

- To Old Town, to see new swordsman there.

- They say his Kung Fu is strange, but very good, so I'd like to fight him.

- No need.

- We've no quarrels with him and nor has he with us. So leave him be and let him pass. And if he does give trouble, others can deal with him.

- Our contest is not till tomorrow. You're too early.

- Tough.

- What do you mean? Hm!

- You already sent some men after me, didn't you?

- Where are they?

- They're all in hell. Assassins deserve to die.

- I do my fighting out in the open and never by stealth.

[...]