Know when to leave when the heat is coming I learned that
This is where DeNiro would be if he ain't turn back

from Kanye West (Ft. Jay-Z) – Illest Motherfucker Alive Lyrics on Rap Genius

Meaning

Reference to the De Niro / Pacino vehicle, “Heat” — DeNiro plays a master criminal who, on the verge of escaping, swerves away from LAX in order to take revenge on a traitor from his gang, leading to his demise. Hov suggests that had DeNiro made the right call he would be retired and wealthy, just like Jay.

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