Has the story of those before you not reached you? Of the people of Nuh (Noah), and ‘Ad and Samood (Thamud) and of those who were after them? No one knows them but Allah. The messengers (from Allah) came to them with Clear (Signs): But they put their hands to their mouths, and said: "Verily, we reject (the very purpose) for which you have been sent, and we are really in distrustful (uneasy) doubt about that to which you invite us."