I read about it in the Biggie biography by Cheo Hodari Coker (from VIBE) called Unbelievable. I think I've heard the audio of it at some point, its hilarious. Biggie is high as shit. Coker wrote that Biggie's limo was driving around the night he said that and at a light, a caravan of like 40 cars surrounded Biggie's limo, all strapped, and it was E-40 and his posse. Apparently BIG retracted his remarks and 40 didn't start nothing.