Concise Quran Commentary
The people of the cave remained in their cave for three hundred and nine years.
Tafsir for this Ayah
Surah 18 : Ayah 25
Surah 18 : Ayah 25
وَلَبِثُوا۟ فِى كَهْفِهِمْ ثَلَـٰثَ مِا۟ئَةٍ سِنِينَ وَٱزْدَادُوا۟ تِسْعًا
They remained in their cave for three hundred years, plus nine[17].