But what could have put him in this state of mind?

2 seconds sound clip from the The Mummy (1959) movie soundboard.

You can hear this line at 00:23:55.773 in the Blu-ray version of the movie.

Quote context

[...]

- I've never known him so violent.

- He seems to have a persecution mania. He... He thinks there's somebody who wants to kill him.

- When did it start?

- Yesterday evening.

- There's... There's nothing I can do I suppose.

- Nothing whatever, I'm afraid.

- We have him in a padded cell for his own safety.

- Is that really necessary?

- We cannot possibly afford to take any chances. He may do himself a serious injury.

- You see, with this persecution complex, he's quite liable to take his own life in order to cheat whoever he thinks is after him. It's quite common.

- But what could have put him in this state of mind?

- As far as I know, he hasn't an enemy in the world.

- Great Karnak, god of all light and darkness, hear this prayer from the humblest of your servants.

- Help me in my task. Make my way easy, that I may achieve your desires and return to the land of my forebears.

(MEHEMET READING THE SCROLL OF LIFE)

[...]