This is the bass loop that appears throughout the song.
--------9----------|
------------7--6---|
--7----------------|
-------------------|

--------9----------|
------------7--6---|
--7----------------|
-------------------|

it is a very similar pattern to the Raekwon song "Guillotine" which makes me think that 
RZA probably makes most of his own beats from scratch with a sampler or something of the like.

guillotine (slightly different timing, not a bass line) :

 ------9---8--------|
-------------7--6---|
--7-----------------|
--------------------|