Jor-El worked incessantly to complete his tiny spaceship though he knew only one of them could go in it.
7 seconds sound clip from Superman (1948) - Superman Comes To Earth (Chapter 1).
You can hear this line at 00:08:05.991 in the Blu-ray version of the episode.
Quote context
[...]
- I, for one, refuse to be intimidated.
- No.
- The council has spoken, Jor-El.
- Not spoken, Ro-Zon. It has pronounced the death sentence for all Krypton.
- The fatal moment had come. All Krypton shuddered as it suffered the tormenting agonies of doom.
- Eban, it's landed over there behind that rock.
- A baby. It's alive. How could it be?
- The blankets are made of some odd material. It must be fireproof.
- Hey, it's a cute little tyke, isn't it?
[...]