18 : 12
ثُمَّ بَعَثۡنَٰهُمۡ لِنَعۡلَمَ أَيُّ ٱلۡحِزۡبَيۡنِ أَحۡصَىٰ لِمَا لَبِثُوٓاْ أَمَدٗا
Then We awakened them so that We may see which of the two parties would be more precise in calculating the length of their stay.
Ayah 12 of الكَهف (18 : 12). This page carries the verse in the Uthmani script with a translation of its meaning, at a stable URL that can be cited on its own.
ثُمَّ بَعَثۡنَٰهُمۡ لِنَعۡلَمَ أَيُّ ٱلۡحِزۡبَيۡنِ أَحۡصَىٰ لِمَا لَبِثُوٓاْ أَمَدٗا
Then We awakened them so that We may see which of the two parties would be more precise in calculating the length of their stay.