The planet Krypton, my son.

4 seconds sound clip from the Superman (1978) movie soundboard.

You can hear this line at 00:58:17 in the Blu-ray version of the movie.

Quote context

[...]

- Traveling through time and space in the six known dimensions.

- Your powers will far exceed those of mortal men.

- It is forbidden for you to interfere with human history. Rather, let your leadership stir others to.

- In this next year, we shall examine the human heart. It is more fragile than your own.

- As we pass through the flaming turmoil which is the edge of your own galaxy, we'll enter the realm of the red Krypton sun, source of your strength and nourishment, cause of our eventual destruction.

- The planet Krypton, my son.

- Your home, as it was.

- This year, we shall examine the various concepts of immortality and their basis in actual fact.

- The total accumulation of all knowledge, spanning the 28 known galaxies is embedded in the crystals which I have sent along with you.

- Study them well, my son, and learn from them.

[...]