5:31
فَبَعَثَ اللّهُ غُرَاباً يَبْحَثُ فِي الأَرْضِ لِيُرِيَهُ كَيْفَ يُوَارِي سَوْءةَ أَخِيهِ قَالَ يَا وَيْلَتَا أَعَجَزْتُ أَنْ أَكُونَ مِثْلَ هَـذَا الْغُرَابِ فَأُوَارِيَ سَوْءةَ أَخِي فَأَصْبَحَ مِنَ النَّادِمِينَ
Then Allah sent a raven, who scratched the ground, to show him how to hide the shame of his brother. "Woe is me!" said he; "Was I not even able to be as this raven, and to hide the shame of my brother?" then he became full of regrets-
10:54
وَلَوْ أَنَّ لِكُلِّ نَفْسٍ ظَلَمَتْ مَا فِي الأَرْضِ لاَفْتَدَتْ بِهِ وَأَسَرُّواْ النَّدَامَةَ لَمَّا رَأَوُاْ الْعَذَابَ وَقُضِيَ بَيْنَهُم بِالْقِسْطِ وَهُمْ لاَ يُظْلَمُونَ
Every soul that hath sinned, if it possessed all that is on earth, would fain give it in ransom: They would declare (their) repentance when they see the penalty: but the judgment between them will be with justice, and no wrong will be done unto them.
26:157
فَعَقَرُوهَا فَأَصْبَحُوا نَادِمِينَ
But they ham-strung her: then did they become full of regrets.
34:33
وَقَالَ الَّذِينَ اسْتُضْعِفُوا لِلَّذِينَ اسْتَكْبَرُوا بَلْ مَكْرُ اللَّيْلِ وَالنَّهَارِ إِذْ تَأْمُرُونَنَا أَن نَّكْفُرَ بِاللَّهِ وَنَجْعَلَ لَهُ أَندَاداً وَأَسَرُّوا النَّدَامَةَ لَمَّا رَأَوُا الْعَذَابَ وَجَعَلْنَا الْأَغْلَالَ فِي أَعْنَاقِ الَّذِينَ كَفَرُوا هَلْ يُجْزَوْنَ إِلَّا مَا كَانُوا يَعْمَلُونَ
Those who had been despised will say to the arrogant ones: "Nay! it was a plot (of yours) by day and by night: Behold! Ye (constantly) ordered us to be ungrateful to Allah and to attribute equals to Him!" They will declare (their) repentance when they see the Penalty: We shall put yokes on the necks of the Unbelievers: It would only be a requital for their (ill) Deeds.