Dr. Mustafa Khattab, the Clear Quran - Surah As-Saffat, ayah 144

Translation of Surah As-Saffat, ayah 144 (37:144)

لَلَبِثَ فِي بَطۡنِهِۦٓ إِلَىٰ يَوۡمِ يُبۡعَثُونَ ١٤٤
he would have certainly remained in its belly until the Day of Resurrection.1

Foot notes

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The belly of the whale would have become his grave.