Sampled this now i cant find the original..

I sampled this...now I cant find the original, I checked all the lyrics sites, and even spent 2 days going through my youtube history as there is a ton of dope samples on this song.

this could be part of it, its hard to tell but seems to have the same rhythm. maybe not though man this is pissing me off! I write down all the songs I sample in a notebook and this was one of the first ones I did and I didn't write it down.

shazam?