I done learned from mistakes like who's my men, and who's not
Like who's gone run, but who's not
Like who's gone shoot if you shot
Who gone hold it and who's not
Who gone change spots

from Lloyd Banks – South Side Story Lyrics on Rap Genius

Meaning

Banks has learned from previous mistakes who he can trust in his crew to undertake such tasks as; Dealing drugs, killing and who’s going to snitch.

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