Surah Al-Kahf, ayah 12

18:12

ثُمَّ بَعَثۡنَٰهُمۡ لِنَعۡلَمَ أَيُّ ٱلۡحِزۡبَيۡنِ أَحۡصَىٰ لِمَا لَبِثُوٓاْ أَمَدٗا ١٢

Thumma ba'athnāhum lina'lama ayyul-hizbayni ahsā limā labithū amadā

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.