On her lp Eli And The Thirteenth Confession.
Fifth Dimension [n°2 R&B, n°3 US]
Roy Ayers [on lp Stoned Soul Picnic with Herbie Hancock, Gary Bartz, Ron Carter and Hubert Laws]
Crystal Waters [sample in Ghetto Day]
Staple Singers [sixties recording]
The Fifth Dimension had an even bigger hit with her Wedding Bell Blues (see there).