وَلَبِثُواْ فِي كَهۡفِهِمۡ ثَلَٰثَ مِاْئَةٖ سِنِينَ وَٱزۡدَادُواْ تِسۡعٗا

Wa labisoo fee kahfihim salaasa mi'atin sineena wazdaadoo tis'aa

So they stayed in their Cave three hundred years, and (some) add nine (more)

— Al-Kahf (ٱلْكَهْف), 18:25