These lines are lifted from “Holy War” by Divine Force, an underground cut from 1987 that also used the same breakbeat as “Mighty Healthy”.
In a 2005 interview, RZA explained the link between Divine Force and the Wu and recalled paying the original rapper, Sir Ibu, for the use of his lines:
GZA had a man called Melquan… They call him Funky President Melquan. He had a group named Divine Force, with Sir Ibu… When Ghost did it over, Sir Ibu, who was my buddy, came over and said: “Yo, I need money for that!”. So I gave him $2500. Motherfucker! (laughs) That’s my nigga though.
Kanye West sampled these vocals and recycled the breakbeat for his 2012 song “New God Flow”. We doubt Sir Ibu got paid for that!
Note: For the younguns out there, herb was 80s/90s slang for a nerd, punk, sucker etc.