Surah Az-Zumar, Ayah 56
Quran 39:56 · The Troops · Makki · Para 24 · Page 464
اَنْ تَقُوْلَ نَفْسٌ یّٰحَسْرَتٰی عَلٰی مَا فَرَّطْتُ فِیْ جَنْۢبِ اللّٰهِ وَاِنْ كُنْتُ لَمِنَ السّٰخِرِیْنَ ۟ۙ
Transliteration
An taqoola nafsun ya hasrataAAala ma farrattu fee janbi Allahiwa-in kuntu lamina assakhireen
Saheeh International
Lest a soul should say, "Oh, [how great is] my regret over what I neglected in regard to Allāh and that I was among the mockers."
Al-Mukhtasar fi Tafsir
Act now to avoid the soul's extreme regret when it will declare on the day of resurrection: Alas my grief over my negligence in my duty to Allah by the disbelief and sins committed, and the mocking of the people of faith and obedience in the world.
Tafsir Ibn Kathir (abridged)
Explains 39:53–39:59 together — read it on 39:53