Surah Ali 'Imran 3:147

وَمَا كَانَ قَوْلَهُمْ إِلَّآ أَن قَالُوا۟ رَبَّنَا ٱغْفِرْ لَنَا ذُنُوبَنَا وَإِسْرَافَنَا فِىٓ أَمْرِنَا وَثَبِّتْ أَقْدَامَنَا وَٱنصُرْنَا عَلَى ٱلْقَوْمِ ٱلْكَـٰفِرِينَ

And their words were not but that they said, "Our Lord, forgive us our sins and the excess [committed] in our affairs and plant firmly our feet and give us victory over the disbelieving people."

Translation: Saheeh International

Tafsir

All that they said when their prophet had been killed while they stood their ground and were steadfast was ‘Our Lord forgive us our sins and our excesses our overstepping the bounds in our affairs a declaration of the fact that what had befallen them was the result of their evil actions and a humbling of their selves …

Excerpt from Tafsir al-Jalalayn, commentary on 3:147, via Quran.com. The reader has the full commentary and 9 more tafsirs.