Al-Kahf 18:12
ثُمَّ بَعَثْنَاهُمْ لِنَعْلَمَ أَيُّ الْحِزْبَيْنِ أَحْصَىٰ لِمَا لَبِثُوا أَمَدًا ١٢
Thumma baAAathnahum linaAAlama ayyu alhizbayni ahsa lima labithoo amadan
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Then We raised them up to see which of the two groups would most rightly calculate (the time) that they stayed (in the cave). (18:12)