I know the song from The Harder They Come soundtrack. Possibly the only soundtrack album that has no duds. Whenever the temperature rises above 85 with standard New Jersey humidity, I put this record on the turntable and sing along.
The title song, The Harder They Come by Jimmy Cliff, brings a tear to my eye. The chorus begins, "So as sure as the sun will shine, I'm gonna get my share now of what's mine." It's an anthem for the down and out, righteous, and sweaty.