Patience.
3 seconds sound clip from the Star Wars: Episode V - The Empire Strikes Back movie soundboard.
You can hear this line at 01:24:22 in the Blu-ray version of the movie.
Quote context
[...]
- Luke, I don't want to lose you to the emperor the way I lost Vader.
- Stopped they must be. On this all depends.
- Only a fully trained Jedi knight, with the Force as his ally, will conquer Vader and his emperor.
- If you honor what they fight for... yes.
- If you choose to face Vader, you will do it alone. I cannot interfere.
- Luke! Don't give in to hate. That leads to the dark side.
[...]