Frankie Knuckles 1993

Hi looking for help ID this track from knuckles show 1993.

Thanks

Possibly surprisingly, it's Madonna (and Shep Pettibone), Up/Down Suite (Dub)

https://www.youtube.com/watch?v=jZPSOLDLDhQ

http://www.discogs.com/Madonna-Rain/release/77802

that's the one! Thanks a lot RJJNYC