And so We made them (the unbelievers) stumble upon them, so that they might know that the promise of Allah is true and that there is no doubt about theHour. They argued among themselves over their affair, then (the unbelievers) said: 'Build a building over them (their remains). Their Lord knows best who they were. 'But those who prevailed over the matter said; 'We will build around them a Mosque'