Surah Al-A'raf, ayah 5

فَمَا كَانَ دَعۡوَىٰهُمۡ إِذۡ جَآءَهُم بَأۡسُنَآ إِلَّآ أَن قَالُوٓاْ إِنَّا كُنَّا ظَٰلِمِينَ ٥

Famā kāna da'wāhum idh jā'ahum ba sunā illā an qālū innā kunnā zālimīn

And their declaration when Our punishment came to them was only that they said, "Indeed, we were wrongdoers!"