Surah Al-Kahf, Verse 12

ثُمَّ بَعَثۡنَٰهُمۡ لِنَعۡلَمَ أَيُّ ٱلۡحِزۡبَيۡنِ أَحۡصَىٰ لِمَا لَبِثُوٓاْ أَمَدٗا١٢

thumma baʿathnāhum linaʿlama ayyu l-ḥiz'bayni aḥṣā limā labithū amadan

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.