- How wrong all of you were. And you got to admit it. You got to all bow and tell me that I'm the greatest.
- That's right, champ. That's right.

10 seconds sound clip from the The Greatest (1977) movie soundboard.

You can hear this line at 00:44:07.443 in the Blu-ray version of the movie.

Quote context

[...]

- Clay does a victory dance. His handlers are jubilant. They're picking him up. The crowd is going wild.

- Cassius Clay, the heavyweight champion of the world and a beaten-up Sonny Liston.

- I am the greatest!

- When did you know he wasn't coming back, Champ?

- Hold it, hold it. First things first. Now, listen, let's get it straight. Just don't forget it now. Sonny Liston was supposed to destroy me.

- How wrong all of you were. And you got to admit it. You got to all bow and tell me that I'm the greatest.

- That's right, champ. That's right.

- I have another announcement I have to make.

- The name Clay, Cassius Clay, my name is no longer Cassius Clay.

- That's right. You heard the rumors. I am a Muslim. That's my religion now. My religion is Islam.

- And the Honorable Elijah Muhammad has named me Muhammad Ali.

[...]