Qur'ān 18:25 · Al-Kahf (الكهف)

وَلَبِثُوا۟ فِى كَهْفِهِمْ ثَلَـٰثَ مِا۟ئَةٍۢ سِنِينَ وَٱزْدَادُوا۟ تِسْعًۭا

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