Sample!?!?

[noobd]

http://www.youtube.com/watch?v=iNY3vaTxOPY - around 2:40-2:55 theres the sample "im getting dizzy up (bizzy up?) cant you tell, i got the rhymes that ___ so well?"

it sounds so familiar, it sounds like its from a beastie boys song or something..? I can't put a finger on it and its really bothering me. Anyone know any songs that use this sample, or at least what song this is taken from?