An unpleasant duty has been masterly performed, Jor-El.
6 seconds sound clip from the Superman (1978) movie soundboard.
You can hear this line at 00:11:26 in the Blu-ray version of the movie.
Quote context
[...]
- You will bow down before me, Jor-El. I swear it.
- An unpleasant duty has been masterly performed, Jor-El.
- They have received the fate they deserved.
- Isolation in the Phantom Zone... an eternal living death.
- A chance for life, nonetheless. As opposed to us.
- It's suicide. No, it's worse. It's genocide.
- Be warned, Jor-El. The council has already evaluated this outlandish theory of yours.
[...]