obscure soul song

[joebarnes101]

at 3:33 minutes into the clip the camera zooms out from a close-up of the main character's face. The main keyboard riff to the song is heard. The song remains in the background for the duration of the sequence where a fight breaks and the main character proceed to beat another man with the gun. while he is being dragged out of the room the song's volume increases. I know this keyboard riff. It's been sampled in a few popular rap songs. What is the song's name and who performed it? Thanks!

http://www.youtube.com/watch?v=NFYh6b8z8xI&feature=fvw

this is a clip from the movie Menace II Society

[Stephen_G]

Don't get your hopes up, joe. Here's the soundtrack listing

http://www.imdb.com/title/tt0107554/soundtrack

Listened to the clip but don't recognize anything.

[Robinia]

It's the Isley Brothers, For the Love of You

https://www.youtube.com/watch?v=Kd2sOqbIcaM