Whatever it is, it's terribly heavy.

3 seconds sound clip from the The Mummy (1932) movie soundboard.

You can hear this line at 00:04:34.600 in the Blu-ray version of the movie.

Quote context

[...]

- Maybe he got too gay with the vestal virgins in the temple.

- Possibly.

- The priestesses of the Temple of Karnak were the daughters of the reigning pharaohs. They were the sacred virgins of Isis.

- Maybe the answer's in that box we found buried with him.

- I see I shall get no more work out of you until after it's open. Come on. Let's have the box up there.

- The Wood's so rotten, it'll fall apart at a touch.

- Whatever it is, it's terribly heavy.

- Metal. Looks like copper. It's gold.

- I say! Look here. The unbroken seals of the Pharaoh Amenophis.

- Some temple treasure.

- 'Death, eternal punishment, for anyone who opens this casket, in the name of Amon-Ra, the King of the Gods.'

[...]