As-Saffaat - 37:144

لَلَبِثَ فِي بَطْنِهِ إِلَى يَوْمِ يُبْعَثُونَ
[37:144]
He would certainly have tarried in its belly to the day when they are raised.
He would certainly have remained inside the Fish till the Day of Resurrection.
He would have tarried in its belly till the day when they are raised;