18:12
ثُمَّ بَعَثْنَـٰهُمْ لِنَعْلَمَ أَىُّ ٱلْحِزْبَيْنِ أَحْصَىٰ لِمَا لَبِثُوٓا۟ أَمَدًا
thumma baʿathnāhum linaʿlama ayyu l-ḥiz'bayni aḥṣā limā labithū amadan
Then We woke them so that We could make clear which of the two parties was better able to work out how long they had been there.
Then We raised them up (from their sleep), that We might test which of the two parties was best at calculating the time period that they had tarried.