From the book Sweet Jones: Pimp C’s Trill Life Story:

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Pimp C’s mother Weslyn “Mama Wes” Monroe talks with author Julia Beverly explaining how the beef between Master P and Pimp C got started, the controversial hotel pistol-whipping incident, and how the two ultimately squashed their beef.

(Note: the album she is referring to was Dirty Money, not Ridin’ Dirty.)