You have just made a serious mistake, my friend, a very stupid...
— Kaa (Sterling Holloway)
10 seconds sound clip from the The Jungle Book (1967) movie soundboard.
You can hear this line at 00:11:12 in the Blu-ray version of the movie.
Quote context
[...]
- Now, no more talk till morning.
- He won't be here in the morning.
- You have just made a serious mistake, my friend, a very stupid...
- Mistake.
- Look me in the eye when I'm speaking to you.
[...]