It's been here. It will come back again.
4 seconds sound clip from the The Thing from Another World movie soundboard.
You can hear this line at 00:53:37 in the Blu-ray version of the movie.
Quote context
[...]
- Doctor, doesn't it seem kind of...
- Is there any blood in there?
- None.
- Everything falls right into line.
- It came here for refuge, heard us, and ran.
- It's been here. It will come back again.
- I'm sure we can communicate with it. We must.
- Will you stand guard here with me tonight?
- Alright.
- Good.
- Tell Dr. Auerbach and Dr. Olson what we've found.
[...]