The Kents took the baby into their home, decided to raise him as their child, and gave him the name of Clark Kent.
8 seconds sound clip from Superman (1948) - Superman Comes To Earth (Chapter 1).
You can hear this line at 00:12:21.094 in the Blu-ray version of the episode.
Quote context
[...]
- 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?
- Ethan, this baby, the queer machine that brought it here... where did they come from?
- That doesn't make sense. What are we going to tell people?
- We're going to tell them nothing. Want everybody to think we've gone crazy?
- Say, we'd better get back to the house. The baby may be hungry.
- He developed rapidly, and it was soon clear that he was no ordinary infant.
- By using his remarkable x-ray vision and super hearing, he could perform unbelievable feats.
- But Clark himself was anything but average.
[...]