72:6
وَأَنَّهُۥ كَانَ رِجَالٌ مِّنَ ٱلْإِنسِ يَعُوذُونَ بِرِجَالٍ مِّنَ ٱلْجِنِّ فَزَادُوهُمْ رَهَقًا
And there were men from mankind who sought refuge in men from the jinn, so they [only] increased them in burden.
The Jinn
وَأَنَّهُۥ كَانَ رِجَالٌ مِّنَ ٱلْإِنسِ يَعُوذُونَ بِرِجَالٍ مِّنَ ٱلْجِنِّ فَزَادُوهُمْ رَهَقًا
And there were men from mankind who sought refuge in men from the jinn, so they [only] increased them in burden.
Nearby ayahs help place verse 72:6 in sequence and meaning.
وَأَنَّهُۥ كَانَ يَقُولُ سَفِيهُنَا عَلَى ٱللَّهِ شَطَطًا
And that our foolish one has been saying about Allah an excessive transgression.
وَأَنَّا ظَنَنَّآ أَن لَّن تَقُولَ ٱلْإِنسُ وَٱلْجِنُّ عَلَى ٱللَّهِ كَذِبًا
And we had thought that mankind and the jinn would never speak about Allah a lie.
وَأَنَّهُمْ ظَنُّوا۟ كَمَا ظَنَنتُمْ أَن لَّن يَبْعَثَ ٱللَّهُ أَحَدًا
And they had thought, as you thought, that Allah would never send anyone [as a messenger].
وَأَنَّا لَمَسْنَا ٱلسَّمَآءَ فَوَجَدْنَـٰهَا مُلِئَتْ حَرَسًا شَدِيدًا وَشُهُبًا
And we have sought [to reach] the heaven but found it filled with powerful guards and burning flames.