Surah Al-A'raf (The Heights), Verse 149

وَلَمَّا سُقِطَ فِیْۤ اَیْدِیْهِمْ وَرَاَوْا اَنَّهُمْ قَدْ ضَلُّوْا قَالُوْا لَىِٕنْ لَّمْ یَرْحَمْنَا رَبُّنَا وَیَغْفِرْ لَنَا لَنَكُوْنَنَّ مِنَ الْخٰسِرِیْنَ ۟

Wa lammaa suqita feee aideehim wa ra aw annahum qad dalloo qaaloo la'il lam yarhamnaa Rabbunaa wa yaghfir lanaa lanakoonanna minal khaasireen

“When they repented, and saw that they had erred, they said: "If our Lord have not mercy upon us and forgive us, we shall indeed be of those who perish."”

Quran 7:149 (Yusuf Ali Translation)