But I know he gon' be asking for a favor one day
But fuck it, I ain't got no choice in the matter

from DMX (Ft. Marilyn Manson) – The Omen Lyrics on Rap Genius

Meaning

Damien (the son of the devil) seems to be following his fathers legacy taking the souls of people by closing deals giving them what they desire
In this case the death of the policemen that killed x’s peoples

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