The term "Sith Lord" was used in a deleted scene from 1977

On my latest rewatch I was wondering when GL first came up with the Sith, since they were not mentioned at all in the OT. As far as the movies at least, it's not until Episode I, so I assumed he came up with them after the OT, but it turns out Vader was a "Sith Lord" from the very beginning!

I had never seen this before so thought I'd share in case others have missed it as well.

Also worth noting is Vader also mentions the "cosmic Force" here, which we didn't get to get to hear more on until the Clone Wars TV show!