And the Day whereon We shall gather them all together, then We shall say to those who did set partners in worship with Us: "Stop at your place! You and your partners." Then We shall separate them, and their partners shall say: "It was not us that you used to worship. (28)"So sufficient is Allah as a witness between us and you that we indeed knew nothing of your worship of us. (29)There! Every person will know (exactly) what he had earned before and they will be brought back to Allah, their rightful Mawla (Lord), and their invented false deities will vanish from them (30)

Allah said:

وَيَوْمَ نَحْشُرُهُمْ

(And the Day whereon We shall gather them)

Allah will gather together all the creatures of earth, human and Jinn, righteous and rebellious. He said in another Ayah:

وَحَشَرْنَاهُمْ فَلَمْ نُغَادِرْ مِنْهُمْ أَحَدًا

(and We shall gather them all together so as to leave not one of them behind.)[18:47]

ثُمَّ نَقُولُ لِلَّذِينَ أَشْرَكُوا مَكَانَكُمْ أَنتُمْ وَشُرَكَاؤُكُمْ

(then We shall say to those who did associate partners: "Stop at your place! You and your partners.")

He then will command the idolators to stay where they are and not to move from their destined places so they would be separated from the place of the believers. Similarly, Allah said:

وَامْتَازُوا الْيَوْمَ أَيُّهَا الْمُجْرِمُونَ

((It will be said): "And O you the criminals! Get you apart this Day (from the believers).)(36:59)

Allah also said:

وَيَوْمَ تَقُومُ السَّاعَةُ يَوْمَئِذٍ يَتَفَرَّقُونَ

(And on the Day when the Hour will be established - that Day shall (all men) be separated (the believers will be separated from the disbelievers).)[30:14]

In the same Surah, [Ar-Rum], Allah said:

يَوْمَئِذٍ يَصَّدَّعُونَ

(On that Day men shall be divided.)[30:43] means, they shall be divided in two.

This is what will take place when Allah Almighty will come for Final Judgement. The believers intercede to Allah so the Final Judgement may come and they get rid of that state. The Prophet ﷺ said,

نَحْنُ يَوْمَ الْقِيَامَةِ عَلَى كُومٍ فَوْقَ النَّاسِ

(On the Day of Resurrection, we will be in a visible place above the [other] people.)

Allah tells us here what He is going to command the idolators and their idols to do on the Day of Resurrection

مَكَانَكُمْ أَنتُمْ وَشُرَكَاؤُكُمْ ۚ فَزَيَّلْنَا بَيْنَهُمْ

("Stop at your place! You and your partners." Then We shall separate them,) and that they would deny their worship and claim their innocence from them. Similarly, Allah said:

كَلَّا ۚ سَيَكْفُرُونَ بِعِبَادَتِهِمْ

(Nay, but they will deny their worship of them.)[19:82],

إِذْ تَبَرَّأَ الَّذِينَ اتُّبِعُوا مِنَ الَّذِينَ اتَّبَعُوا

(When those who were followed declare themselves innocent of those who followed (them).)[2:166], and;

وَمَنْ أَضَلُّ مِمَّن يَدْعُو مِن دُونِ اللَّهِ مَن لَّا يَسْتَجِيبُ لَهُ إِلَىٰ يَوْمِ الْقِيَامَةِ وَهُمْ عَن دُعَائِهِمْ غَافِلُونَ - وَإِذَا حُشِرَ النَّاسُ كَانُوا لَهُمْ أَعْدَاءً

(And who is more astray than one who calls on (invokes) besides Allah, such as will not answer him till the Day of Resurrection, and who are (even) unaware of their calls (invocations) to them? And when mankind are gathered (on the Day of Resurrection), they (false deities) will become their enemies)[46:5-6].

This refers to the partners responding to those who worshipped them.

Then Allah said:

فَكَفَىٰ بِاللَّهِ شَهِيدًا بَيْنَنَا وَبَيْنَكُمْ

(So sufficient is Allah as a witness between us and you.)

They say that we did not know or think that you were worshipping us. Allah is a Witness between us and you that we never called upon you to worship us. We never ordered you to worship us; neither did we accept your worship of us.

Allah said:

هُنَالِكَ تَبْلُو كُلُّ نَفْسٍ مَّا أَسْلَفَتْ

(There! Every person will know (exactly) what he had earned before)

This will be the state of accounting on the Day of Resurrection. Every soul shall know all that it had sent forth, both good and evil. Similarly, Allah said:

يَوْمَ تُبْلَى السَّرَائِرُ

(The Day when all the secrets will be examined.)[86:9],

يُنَبَّأُ الْإِنسَانُ يَوْمَئِذٍ بِمَا قَدَّمَ وَأَخَّرَ

(On that Day man will be informed of what he sent forward (of deeds), and what he left behind.)[75:13], and

وَنُخْرِجُ لَهُ يَوْمَ الْقِيَامَةِ كِتَابًا يَلْقَاهُ مَنشُورًا - اقْرَأْ كِتَابَكَ كَفَىٰ بِنَفْسِكَ الْيَوْمَ عَلَيْكَ حَسِيبًا

(...and on the Day of Resurrection, We shall bring out for him a book which he will find wide open. (It will be said to him): "Read your book. You yourself are sufficient as a reckoner against you this Day.")[17:13-14] Then Allah said,

وَرُدُّوا إِلَى اللَّهِ مَوْلَاهُمُ الْحَقِّ

(and they will be brought back to Allah, their rightful Mawla.)

All affairs and matters will be brought back to Allah, the Judge, the All-Just. He will judge everyone, and then admit the people of Paradise in Paradise and the people of Hell to Hell.

وَضَلَّ عَنْهُم

(and will vanish from them) meaning what the idolators worshipped,

مَّا كَانُوا يَفْتَرُونَ

(what they invented) what they worshipped besides Allah that they invented.