'Even a man who is pure in heart and says his prayers by night may become a wolf when the wolfsbane blooms, and the autumn moon is bright'.

8 seconds sound clip from the The Wolf Man (1941) movie soundboard.

You can hear this line at 00:11:34.120 in the Blu-ray version of the movie.

Quote context

[...]

- Fine, I'll be here at 8:00.

- Yes, that's the sign of the werewolf.

- That's just a legend, though, isn't it?

- Yes, but like most legends, it must have some basis in fact.

- It's probably an ancient explanation of the dual personality in each of us.

- How does it go?

- 'Even a man who is pure in heart and says his prayers by night may become a wolf when the wolfsbane blooms, and the autumn moon is bright'.

- That's funny. That's the same thing the girl in the antique shop said.

- Oh, you met Gwen Conliffe, have you?

- So that's her name!

- I was just looking the town over. Naturally. Continue to look it over. But I want you to know not only the pretty girls, but the old men and women and the young men.

[...]