وَأَنذِرۡهُمۡ يَوۡمَ ٱلۡحَسۡرَةِ إِذۡ قُضِيَ ٱلۡأَمۡرُ وَهُمۡ فِي غَفۡلَةٖ وَهُمۡ لَا يُؤۡمِنُونَ ٣٩
And warn them, [O Muḥammad], of the Day of Regret, when the matter will be concluded;1 and [yet], they are in [a state of] heedlessness, and they do not believe.
Translation: Saheeh International (English)
1 i.e., "judged" or "accomplished."
Each word's meaning and sound
And warn the people, O Messenger, of the Day of Regret when the evildoer will regret his evil-doings and when the righteous will regret not being more obedient, when the scrolls of the servants will be wrapped, their reckoning is finished and each person goes towards what he had sent forward. But they have been deceived by their worldly life and are unmindful of the Hearafter, and they do not accept the Day of Judgment.
Al-Mukhtasar in interpreting the Noble Quran