With each hour, the intensity of the tremors increased. Krypton became unbearably hot as it was drawn closer to the sun.
9 seconds sound clip from Superman (1948) - Superman Comes To Earth (Chapter 1).
You can hear this line at 00:07:56.182 in the Blu-ray version of the episode.
Quote context
[...]
- Gentlemen, are these not the utterances of a man whose mind perhaps has begun to wander?
- 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.
[...]