Gort! Gort! Klaatu... Klaatu barada... barada nikto.
15 seconds sound clip from the The Day the Earth Stood Still (1954) classic radio play.
You can hear this line at 00:48:14 in the radio play.
Quote context
[...]
- Then she saw them. They were lying inside, their rifles fused and bent.
- Gort somehow knew that Klaatu was dead.
- Gort was already on the move. He was on the move toward Helen.
- Gort! Gort! Klaatu... Klaatu barada... barada nikto.
[...]