I see you hustle wit my hustle I
Can keep you
Focused on yo focus I can feed you

from Beyoncé (Ft. Jay-Z) – Upgrade You Lyrics on Rap Genius

She see’s that they have the same ‘hustle’, and therefore they’ll keep each other in check, and look out for the other.
‘Focused on yo focus i can feed you’ meaning she keeps an eye on what he’s doing and can still help out.

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