The British Museum works for the cause of science, not for loot.
4 seconds sound clip from the The Mummy (1932) movie soundboard.
You can hear this line at 00:21:31.160 in the Blu-ray version of the movie.
Quote context
[...]
- I regret. I am too occupied to accept invitations.
- But you might at least have thanked the man. He was responsible for finding the princess.
- Yes. I rather wish he hadn't been.
- I think it's a dirty trick, this Cairo Museum keeping everything we've found.
- The British Museum works for the cause of science, not for loot.
- Anck-es-en-Amon. Anck-es-en-Amon. Anck-es-en-Amon.
- Where do you want to go, miss?
- Imhotep. Anck-es-en-Amon. Anck-es-en-Amon. Imhotep. Imhotep.
[...]