Who used to say:"Are you among those who believe..."means, `do you believe in the resurrection after death, and the Reckoning and reward or punishment!'He used to say that by way of astonishment, disbelief and stubbornness.أَيِذَا مِتْنَا وَكُنَّا تُرَابًا وَعِظَامًا أَيِنَّا لَمَدِينُونَ