Stop screaming, you know the demon said it's best to die
No point in protesting your impending murder. Jay-Z cites Satan’s suggestion that death be embraced (from the Book of Genesis: “In that day ye eat of that fruit ye shall die”) and in so doing shows that he accepts the “devil’s” authority.
Additionally Jay-Z is referring to the practice of selling one’s soul “for the love of money” and in turn receiving eternity in hell. If you go through with this, your fate is sealed no matter what, so you might as well enjoy your time on Earth instead of fearing your inevitable death the whole time. In the sense of this song, he is referring to how there is no turning back after the awful deeds he has done (kidnapping the girl, killing his friend, shooting at rival gangs, etc.), so it better have been worth it.
To help improve the meaning of these lyrics, visit "D'Evils" by Jay Z Lyrics and leave a comment on the lyrics box