The boundary between heaven and hell

وَبَيْنَهُمَا حِجَابٌۭ ۚ وَعَلَى ٱلْأَعْرَافِ رِجَالٌۭ يَعْرِفُونَ كُلًّۢا بِسِيمَىٰهُمْ ۚ وَنَادَوْا۟ أَصْحَٰبَ ٱلْجَنَّةِ أَن سَلَٰمٌ عَلَيْكُمْ ۚ لَمْ يَدْخُلُوهَا وَهُمْ يَطْمَعُونَ

Between them shall be a veil, and on the heights will be men who would know every one by his marks: they will call out to the Companions of the Garden, "peace on you": they will not have entered, but they will have an assurance (thereof).

يَوْمَ يَقُولُ ٱلْمُنَٰفِقُونَ وَٱلْمُنَٰفِقَٰتُ لِلَّذِينَ ءَامَنُوا۟ ٱنظُرُونَا نَقْتَبِسْ مِن نُّورِكُمْ قِيلَ ٱرْجِعُوا۟ وَرَآءَكُمْ فَٱلْتَمِسُوا۟ نُورًۭا فَضُرِبَ بَيْنَهُم بِسُورٍۢ لَّهُۥ بَابٌۢ بَاطِنُهُۥ فِيهِ ٱلرَّحْمَةُ وَظَٰهِرُهُۥ مِن قِبَلِهِ ٱلْعَذَابُ

One Day will the Hypocrites- men and women - say to the Believers: "Wait for us! Let us borrow (a Light) from your Light!" It will be said: "Turn ye back to your rear! then seek a Light (where ye can)!" So a wall will be put up betwixt them, with a gate therein. Within it will be Mercy throughout, and without it, all alongside, will be (Wrath and) Punishment!