(And warn them) O Muhammad (of the Day of anguish) of the Day of regret (when the case hath been decided) when the reckoning is over and the people of Paradise enter Paradise and the people of hell enter hell and Death is slain. (Now they are in a state of carelessness) in a state of ignorance and blindness concerning it, (and they believe not) in Muhammad (pbuh) in the Qur'an or in resurrection after death.