Then We awakened them that We might show which of the two factions was most precise in calculating what [extent] they had remained in time.
The Saheeh International Quran Translation
ثُمَّ بَعَثْنَٰهُمْ لِنَعْلَمَ أَىُّ ٱلْحِزْبَيْنِ أَحْصَىٰ لِمَا لَبِثُوٓا۟ أَمَدًاThen We awakened them that We might show which of the two factions was most precise in calculating what [extent] they had remained in time.