What female group from the seventies made a song with the words say you will then you won't?

The female group from the seventies that made a song featuring the lyrics "say you will, then you won't" is The Emotions. Their hit song "Best of My Love," released in 1977, includes these Words and reflects the themes of love and uncertainty. The Emotions were known for their soulful harmonies and were prominent figures in the R&B and disco scenes of that era.