The Prophets
يَوْمَ نَطْوِى ٱلسَّمَآءَ كَطَىِّ ٱلسِّجِلِّ لِلْكُتُبِ ۚ كَمَا بَدَأْنَآ أَوَّلَ خَلْقٍ نُّعِيدُهُۥ ۚ وَعْدًا عَلَيْنَآ ۚ إِنَّا كُنَّا فَـٰعِلِينَ
The Day when We will fold the heaven like the folding of a [written] sheet for the records. As We began the first creation, We will repeat it. [That is] a promise binding upon Us. Indeed, We will do it.
Nearby ayahs help place verse 21:104 in sequence and meaning.
لَا يَسْمَعُونَ حَسِيسَهَا ۖ وَهُمْ فِى مَا ٱشْتَهَتْ أَنفُسُهُمْ خَـٰلِدُونَ
They will not hear its sound, while they are, in that which their souls desire, abiding eternally.
لَا يَحْزُنُهُمُ ٱلْفَزَعُ ٱلْأَكْبَرُ وَتَتَلَقَّىٰهُمُ ٱلْمَلَـٰٓئِكَةُ هَـٰذَا يَوْمُكُمُ ٱلَّذِى كُنتُمْ تُوعَدُونَ
They will not be grieved by the greatest terror, and the angels will meet them, [saying], "This is your Day which you have been promised" -
وَلَقَدْ كَتَبْنَا فِى ٱلزَّبُورِ مِنۢ بَعْدِ ٱلذِّكْرِ أَنَّ ٱلْأَرْضَ يَرِثُهَا عِبَادِىَ ٱلصَّـٰلِحُونَ
And We have already written in the book [of Psalms] after the [previous] mention that the land [of Paradise] is inherited by My righteous servants.
إِنَّ فِى هَـٰذَا لَبَلَـٰغًا لِّقَوْمٍ عَـٰبِدِينَ
Indeed, in this [Qur'an] is notification for a worshipping people.