The Disbeliever's warning of the Day of Distress

Allah, the Exalted, says informing about the disbelievers on the Day of Resurrection that they will be made to have the clearest hearing and sight. This is as Allah says,

وَلَوْ تَرَى إِذِ الْمُجْرِمُونَ نَاكِسُواْ رُءُوسِهِمْ عِندَ رَبِّهِمْ رَبَّنَآ أَبْصَرْنَا وَسَمِعْنَا

يَوْمَ الْحَسْرَ‌ةِ (the Day of Remorse) in verse 39 refers to the Day of Judgment and has been called the Day of Remorse because on that day persons consigned to Hell as punishment for their evil deeds will regret their disregard of the righteous way of life, and wish that if they had lived the life of true believers, they too would have been in Paradise instead of being punished in Hell. Even those who have been rewarded with Paradise will feel a different kind of remorse. Al-Tabarani and Abu Ya` la have quoted the following saying of the Prophet ﷺ on the authority of Sayyidna Mu'adh ؓ .

"The people of Paradise will regret only one thing, namely those moments which were spent without the remembrance of Allah."