What sample has been used in this song ?

This song has a piano beat in the background which sounds familiar, from an older song. Do you know what the piano sample is taken from?

https://www.youtube.com/watch?v=0vN-n6goSqw


(I don't mean the "This is how we do it" bit..

I mean the Piano Beat sample, where is it from?
(not the vocal, but the beat)