Every time a baby is born, somebody's slain
You know the saying, somebody's lose is another's gain

from Jay Z (Ft. Lenny Kravitz) – Guns & Roses Lyrics on Rap Genius

Meaning

A baby’s bein' born same time a man is murdered

The birth rate and death rate are so close that its almost literally a fact that everytime someone is born another person dies, So the parents of the newborns gain is the loss of another person to the grave..

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