hey any help appreciated on this quote

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Feb 17, 2006
Hey im lookin for a quote by tech n9ne, hes always pushed the idea of rap about what you know about etc.. i know this has been said in songs and that he also learned this from Quincy Jones. But i thought this was quoted from a much more prestigious musician, so if anyone can point me towards the person who said this, tell me i am wrong or any help at all itd be great.. thanks...