The Day of Distinction (yaw al-fasl)...
The Day of Distinction (yaw al-fasl), the appointed time when all humanity gather, is one of the appellations of Resurrection, since truth and falsehood will be distinguished on that Day and the wrong doings of wrong doers will be compensated. The people of truth and falsehood will clearly see their past deeds and their deeds will be recompensed.
According to the latter two Verses no friend may meet the demands of his friend since no one will be able to extend help to his friends unless one will be granted Divine Mercy and Favor, since Glory, Dignity, and Succor will solely belong to Divine Essence. He is All-Merciful and All-Gracious toward his creatures. He chastises or forgives whomever He Wills. It is needless to say that His chastisement and forgiving are based on Divine Justice and Wisdom and no wrong will be done to anyone.
Since His Mercy surpasses His Wrath, we are all hopeful to enjoy His Mercy and sinners, no matter to what extent they have transgressed the bounds, should not despair of His Mercy. It is in the Holy Qur’an that: “Certainly no one despairs of Allah’s Mercy, except the people who disbelieve” ^3 . The righteous good doing pious should fear God at all times and not be arrogant for their deeds since they may never know whether their deeds are accepted by God.
Mohl is used in the sense of molten or impure metal or copper. The four Verses concern the torment of sinners, particularly disbelievers.
By athim (“sinful”) disbelievers may be intended since the preceding Verses were about disbelievers and the general theme of the Verses indicate that one who believes in Divine Unity, Resurrection, the prophethood of the Seal of the Prophets (S), and the imamate of the Infallible Imams (as), even if he happens to be a sinner, he will not be inflicted with such torment.
Based on the above, some exegets maintain that the Verses in question allude to the cursed Abu Jahl who went to the extreme in disbelief, grudge, and animosity against the Prophet (S).