And (remember) the Day We shall cause the mountains to pass away (like clouds of dust), and you will see the earth as a leveled plain, and we shall gather them all together so as to leave not one of them behind. (47)
Allah ta’ala commands us: warn them of the Day when the mountains will be set in motion; moved easily and brought down. We see the mountains as symbols of stablity and firmness, but on the Day of Judgment, the mountains will be moved easily like a mirage.
The earth will be made flat –no mountains, plains or trees– and it also means that whatever is in the earth will be brought out. Allah ta’ala says in surah Zalzalah ayah 2 “and the earth discharges its burdens.”
The people will be gathered, and none will be left behind.
حَشَرْنَاهُمْ, We shall gather them, is in past tense, why?
1- to show the certainty of hashr/gathering
2- indicates the hashr/gathering after resurrection is going to be before the destruction of the earth.
How will we be gathered?
And they will be set before your Lord in (lines as) rows, (and Allah will say): “Now indeed, you have come to Us as We created you the first time. Nay, but you thought that We had appointed no meeting for you (with Us).” (48)
Imagine that Day: the earth is flat, the mountains are gone, and everyone will be presented before Allah azza wa jal in rows. No one can behind another person or be looked over. Allah ta’ala says nothing will be concealed on that day.
People will come upon that day:
2- unclothed and barefoot
Everyone from the first of people to the last of people..So how can someone feel alone in this huge gathering? Everything will be worried about their own selves and cannot provide comfort for each other. This can be likened to the scenes at Hajj; although you are surrounded by hundreds of people, if you are lost from your group, you feel alone, confused and scared…And indeed the Day of Judgment is a greater example.
Then Allah ta’ala describes the hisaab:
And the Book (one’s Record) will be placed, and you will see the criminals, polytheists, sinners, fearful of that which is (recorded) therein. They will say: “Woe to us! What sort of Book is this that leaves neither a small thing nor a big thing, but has recorded it with numbers!” And they will find all that they did, placed before them, and your Lord treats no one with injustice. (49)
The criminals will be mushfiqeen on that day. Ishfaaq is used to describe fear that is in the heart: apprehension, anxiety and worry. The Mujrimeen will be feeling this because they will see their book knowing what they did and they will be given their book in their left hand. They will feel regret for not doing good deeds, they will feel sadness for choosing evil or good, and they will be fearful knowing of the punishment that is awaiting them.
On seeing what is in their book they will say out of shock and amazement, ‘what is with this book that it does not leave anything that is small nor big?!’ When small or big is not left out, it means absolutely nothing has been left it: this book has recorded every deed and every action. We learn that we should not treat any sin as minor; because they will lead to bigger sins. Ibn Abbass radi Allahu anhuma said an example of a sagheera is smiling and a kabeera is laughing uncontrollably. Sa’eed ibn Jubayr rahimahullah said a sagheera is a non Mahram man touching the hand of a woman, and a kabeera would be to commit zina.
Allah ta’ala says, أَحْصَاهَا , ihsaa means to not only count but to count and protect; it includes the entry and analysis. This data has not only been recorded, but it has been kept safe until the Day of Judgment.
The record of the deeds is going to be present and they will find the recompense of their actions present on the Day of Judgment.
Allah ta’ala says no one will have dhulm done to them: He does not reduce the recompense for anyone: whatever punishment or reward one deserves is what they wil receive and He will not be unjust in giving the punishment.