It's ironic. He could save others from death, but not himself.

Palpatine Darth Sidious (Ian Mcdiarmid)

10 seconds sound clip from the Star Wars: Episode III - Revenge of the Sith movie soundboard.

You can hear this line at 00:47:39 in the Blu-ray version of the movie.

Quote context

[...]

- He could actually save people from death?

- The dark side of the Force is the path way to many abilities some consider to be unnatural.

- What happened to him?

- He became so powerful, the only thing he was afraid of was losing his power. Which eventually, of course, he did.

- Unfortunately he taught his apprentice everything he knew. Then his apprentice killed him in his sleep.

- It's ironic. He could save others from death, but not himself.

- Is it possible to learn this power?

- Not from a Jedi.

- All Red units, over here! Let's go, let's go, let's go!

- Palpatine thinks General Grievous is on Utapau?

- A partial message was intercepted in a diplomatic packet from the chairman of Utapau.

[...]