﴿ وَلَمَّا سُقِطَ فِىٓ أَيْدِيهِمْ وَرَأَوْا۟ أَنَّهُمْ قَدْ ضَلُّوا۟ قَالُوا۟ لَئِن لَّمْ يَرْحَمْنَا رَبُّنَا وَيَغْفِرْ لَنَا لَنَكُونَنَّ مِنَ ٱلْخَٰسِرِينَ ﴾

“although [later,] when they would smite their hands in remorse, having perceived that they had gone astray, they would say, "Indeed, unless our Sustainer have mercy on us and grant us forgiveness, we shall most certainly be among the lost!"”

The verse 149 speaks of their remorse on this guilt and their repentance,