It may be an ill omen to sing in a cemetery, but there's no law against it.

— Oliver Davis (Marc Cramer)

4 seconds sound clip from the Isle of the Dead (1945) movie soundboard.

You can hear this line at 00:07:44.598 in the Blu-ray version of the movie.

Quote context

[...]

- Someone has broken into the coffin. It's empty.

- Maybe you've got the wrong crypt. After all, it's a long time since you were last here.

- No, I'm sure this was the place.

- Well, let's get back.

- Why should anyone be here and singing?

- It's a nice moonlit night. Someone might have crossed over.

- But to a cemetery?

- It may be an ill omen to sing in a cemetery, but there's no law against it.

- There is a law against despoiling graves. Perhaps the singer can tell us who broke that law.

- Come in. Come in.

- General Pherides. I am honored, sir. Please, won't you come in?

- I came here to visit the last resting place of my wife.

[...]