The expression "what an Inevitable Day it is" lays further...
The expression "what an Inevitable Day it is" lays further emphasis on the Greatness of the Events to happen on that Great Day, such that the Noble Prophet of the Islamic faith (S) is addressed by saying that he is unaware of the qualities of that Day.
It is true, since the prisoners in this world like us are incapable of understanding the Events to occur on the Day of Resurrection in the same manner that understanding the affairs of this world in incomprehensible to the fetus in the mother’s womb. Some Qur’an exegetes maintain that the word al-haqqa implies the torments with which obdurate sinners and the vain disobedient are inflicted of a sudden.
It is worthy of note, however, that the contextual meaning of following Verses stand in further harmony with the excruciating and destructive torments inflicted upon the peoples of ‘Àd, Thamud, Lot, and Pharaoh.
Prophet Salih was Divinely appointed to call them onto obedience to God Almighty, though they never believed and rose against him and even asked him to send down the promised torment if he was true in his Prophetic Call. Then, a destructive lightning was sent down on them. Their firmly built palaces and mansions trembled in a few moments and destroyed them all and their dead bodies were cast on the ground.
It is worthy of note that the Holy Qur’an mentions an incontrollable torment as the cause behind their destruction.