Sura 18 Al-Kahf (The Cave), ayah 25

1. وَلَبِثُوا فِي كَهْفِهِمْ ثَلَاثَ مِائَةٍ سِنِينَ وَازْدَادُوا تِسْعًا

   And they remained in their cave for three hundred years and exceeded by nine.

   18:25

Translation: Saheeh International