What did Lupe Fiasco Sample on "Put You On Game" ?

I was in the mall one time but was in and out of a store because I was in a hurry and heard this track. I think it was rock but anyways it had the same bassline and string that plays in Lupes song. I know it was because Put You On Game is one of my fav songs so i know i aint trippin. I tried to google it but couldnt find it. I wanna hear the original if there is one.