Four and five knew each other, but never met the other three.
7 seconds sound clip from the Five Deadly Venoms movie soundboard.
You can hear this line at 00:06:05 in the Blu-ray version of the movie.
Quote context
[...]
- A little later, though he never met number one or number two.
- After number three left, I took up pupils number four and five.
- Number four in fact was older than number two and three.
- The fifth pupil, he practiced the toad style.
- Four and five knew each other, but never met the other three.
- It can even bend solid metal.
- So then compared with the other pupils, you don't stand up, you're not really their match.
- I taught all I could, but time's run out.
[...]