Got it!, the sample is from Webster Lewis - You Deserve To Dance (1979), and the vocals are from J.J. Barnes. I rather listen to the Javi Frias version tho.
Such a nice track this. Definitely going to be one of my summer tunes! I share more stuff on my music blog, feel free to check it out, and have a lovely day x facebook.com/thenoisyneighbour/