Sampled Song

This song has been sambled by everyone. The artist Shareefa on DTP, her song is entitled 'Butterfly' track # 7 and it has a sample from someone's song. Raekwon from Wu Tang Clan did the same thing on his 'Only Build for Cuban Links' ( I think that's the name of his first album) album on his outro. Anyway, does n e 1 know the song from which it was sampled from. Tku