Surah Al-Anbya 21:97

وَٱقْتَرَبَ ٱلْوَعْدُ ٱلْحَقُّ فَإِذَا هِىَ شَـٰخِصَةٌ أَبْصَـٰرُ ٱلَّذِينَ كَفَرُوا۟ يَـٰوَيْلَنَا قَدْ كُنَّا فِى غَفْلَةٍ مِّنْ هَـٰذَا بَلْ كُنَّا ظَـٰلِمِينَ

And [when] the true promise [i.e., the resurrection] has approached; then suddenly the eyes of those who disbelieved will be staring [in horror, while they say], "O woe to us; we had been unmindful of this; rather, we were wrongdoers."

Translation: Saheeh International

Tafsir

And the true promise that is the Day of Resurrection draws near and behold when the gaze of the disbelievers will be fixed on that Day because of its severity saying ‘O yā is for exclamation woe to us! this is our destruction! Verily in the life of the world we were oblivious to this Day. …

Excerpt from Tafsir al-Jalalayn, commentary on 21:97, via Quran.com. The reader has the full commentary and 9 more tafsirs.