الزمر — Az-Zumar Ayat 56

اَنْ تَقُوْلَ نَفْسٌ يّٰحَسْرَتٰى عَلٰى مَا فَرَّطْتُّ فِيْ جَنْۢبِ اللّٰهِ وَاِنْ كُنْتُ لَمِنَ السّٰخِرِيْنَۙ

An taqūla yā ḥasratā ‘alā mā farraṭṭu fī jambillāhi wa in kuntu laminas-sākhirīn(a).

"Lest a soul should say, "Oh [how great is] my regret over what I neglected in regard to Allah and that I was among the mockers.""